Near the time of birth, lanugo hair is replaced by vellus hairs which are short, fine, and usually unpigmented, and terminal hairs which are typically long, coarse, and pigmented.
What is meant by Lanugo hair?Lanugo hair is a fine, downy hair that grows on the body of a developing fetus in the womb. It is usually shed before birth and replaced by vellus hair, which is the soft, fine hair that covers most of the body surface in humans.
In some cases, however, lanugo hair may persist after birth, particularly in premature infants or in individuals with certain medical conditions. In these cases, the hair may be more noticeable and may require treatment or management.
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which of the following did mitochondria evolve from, according to the hypothesis of serial endosymbiosis?
According to the serial endosymbiosis hypothesis, the following did mitochondria evolve is from free-living procryotics.
The endosymbiosis theory is a theory that states that eukaryotic organisms originated from the evolution of single-celled prokaryotic organisms. The single-celled prokaryotic organisms that turn into mitochondria are aerobic bacteria.
Mitochondria are the cell's energy-producing organelles with a two-layer, indented inner membrane and a broad, smooth membrane. The endosymbiosis theory explains that aerobic bacteria which are prokaryotic cell types are swallowed by large organisms but are not digested and live in the host cell. So aerobic bacteria enter into symbiosis by transferring their DNA to the host cell and live inseparably. The bacteria then turn into mitochondria in the eukaryotic cell body.
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which of the following describes the amount of organic material that is available for transfer to the next trophic level after subtracting material used for respiration?(1 point)
The following describes amount of organic material that is available for transfer to next trophic level after subtracting material used for respiration : Net Primary productivity.
What is meant by net primary productivity?Gross primary productivity minus the rate of energy loss to metabolism and maintenance is called net primary productivity. It is the rate at which energy is stored as biomass by plants or other primary producers and made available to the consumers in ecosystem.
Net Primary Productivity is equal to all of the carbon taken by vegetation through photosynthesis which is called Gross Primary Production minus carbon that is lost to respiration; NPP = GPP - respiration.
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Note: The question given on the portal is incomplete. Here is the complete question.
Question: Which of the following describes the amount of organic material that is available for transfer to the next trophic level after subtracting material used for respiration?
-Gross Primary productivity
-Biomass
-Net Primary productivity
0r
-Primary productivity
When a chinese hamster with white spots is crossed with another hamster that has no spots, approximately 1/2 of the offspring have white spots and 1/2 have no spots. When two hamsters with white spots are crossed 2/3 of the offspring possess white spots and 1/3 have no spots.
a) What is going on with these crosses, in other words, why are you not observing the typical 1:3 ratio expected from a monohybrid cross?
b) Can you produce Chinese hamsters that breed true for white spotting?
A. Because the 1:1 ratio shows the spotting hamster seems to have the heterozygous phenotype and the 2:1 ratio suggests mortality.
B. Hamster is heterozygous, accurate breeding spotting is impossible.
What does phenotype mean?The apparent traits of an individual that are the result of gene expression; the clinical manifestation of a person with a certain genotype. Three phenotypic classes—AA, Aa, and aa—can be derived from a single locus including additive effects.
How is a phenotype recognized?The genotype as well as expressed genes of a person, as well as visual qualities like eye color, body type, height, as well as traits of the hair, constitute the phenotype. Environment factors have an impact in addition to genetics.
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The stomach has to absorb glucose even though there is a higher concentration of glucose inside the cell, how does this happen?
Glucose is transported across the membrane by two mechanisms, glucose is transported against a concentration gradient in the intestine and renal proximal tubule, by secondary active transport mechanism. Here glucose is cotransported with sodium ions.
What is absorption of glucose?After intake and digestion of glucose, it is absorbed in the small intestine by the two-step transport system. At first, glucose is concentrated in the cells through sodium-dependent glucose transporter SGLT-1. Intracellular glucose is then released into interstitial space.
Glucose absorption is initiated at the apical membrane by the cotransporter SGLT-1 by a transepithelial transport system. Intracellular glucose then diffuses across the basolateral membrane through GLUT2.
Therefore, The stomach has to absorb glucose even though there is a higher concentration of glucose inside the cell.
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which three of these are true;
1.Hydrophobic molecules do not readily dissolve in water in part because water molecules involved in hydration cannot participate in normal hydrogen bonding with one another.
2.Nonpolar molecules are capable of forming micelles.
3.The tendency of water to minimize its contact with nonpolar substances is called the hydrophobic effect.
4.Amphipathic (amphiphilic) lipids are the structural basis of biological bilayer membranes.
5.Hydrophobic molecules are individually hydrated in water, increasing the entropy of the system.
1.Hydrophobic molecules do not readily dissolve in the water in part because water molecules involved in hydration cannot participate in the normal hydrogen bonding with one another. 3.Tendency of water to minimize contact with nonpolar substances is called as hydrophobic effect. 4.Amphipathic lipids are structural basis of biological bilayer membranes.
What is meant by hydrophobic molecules?Hydrophobic means “the fear of water”. Hydrophobic molecules and surfaces repel water and hydrophobic liquids, such as oil, will separate from water. Hydrophobic molecules are nonpolar meaning the atoms that make molecule do not produce static electric field.
Hydrophobic substances are made of non-polar molecules that repel bodies of water and attract other neutral molecules and non-polar solvents.
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What are codominance incomplete dominance and polygenic traits?
Two other types of genetic inheritance are codominance and incomplete dominance. Incomplete dominance is one of the characteristics that polygenic inheritance displays.
When the gene's alleles have an additive effect, one allele does not mask or dominate another, which is known as incomplete dominance. A combination of the phenotypes of the parents will make up the phenotype of the offspring.
A trait that is influenced by two or more genes, such as height or skin tone, is referred to as a polygenic trait. Polygenic traits do not follow the laws of Mendelian inheritance since several genes are involved. Instead of being uniformly pink, a flower that is showing codominance will have patches of red and white. The F2 generation from heterozygous plants will have a ratio of -1:2:1 in incomplete dominance.
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What are the male reproductive cells in
a plant called?
A. sperm
B. stem
C. egg
D. pollen
Answer:
Option d
Iajajananahahahaau
fill in the blank. when a plant is illuminated from one side, auxin is transported to the___side of the shoot, where it stimulates cells to___, causing the shoot to bend toward the light.dark; expandlight; dividelight; expanddark; divide
The correct option is 1; Dark; expand , When a plant is lighted from one side, auxin is carried to the shoot's Dark side, where it encourages cells to expand , causing the shoot to bend toward the light.
When light strikes one side of the coleoptile, phytotropins become more active on that side, forcing auxin to flow down the shaded side.
A scientist extracts cells from a plant stem that are not actively generating auxin. She maintains the cells alive by placing them in a culture plate with a growth media. The cells begin generating more cellulose when she adds auxin to the dish.
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Full Question ;
When a plant is illuminated from one side, auxin is transported to the _______ side of the shoot, where it stimulates cells to _______, causing the shoot to bend toward the light.
1. dark; expand
2. dark; divide
3. light; expand
4. light; divid
If binding site A needs twice the ligand concentration needed for site B to achieve saturation, then
A) Binding site A has a higher affinity for the ligand than binding site B
B) Binding site B has a higher affinity for the ligand than binding site A
C) Both binding sites have the same affinity for the ligand
D) Site B is a competitive inhibitor of site A
E) None of the above is correct
B) If binding site A needs twice the ligand concentration needed for site B to achieve saturation, then Binding site B has a higher affinity for the ligand than binding site A
In biochemistry and molecular biology, a binding site is a region on a macromolecule such as a protein that binds to another molecule with specificity. The binding partner of the macromolecule is often referred to as a ligand. Binding affinity is influenced by non-covalent intermolecular interactions such as hydrogen bonding, electrostatic interactions, hydrophobic and Van der Waals forces between the two molecules. In addition, binding affinity between a ligand and its target molecule may be affected by the presence of other molecules. For protein B (nH = 0.5) , the minimal number is of ligand binding sites is 2. The minimal integer ≥ nH is 1, but at least two binding sites are required for cooperativity. Particularly, intermolecular interactions between proteins and ligands, such as small compounds, occur via amino acid residues at specific positions in the protein, usually located in pocket-like regions. These specific key amino acid residues are called ligand binding sites (LBSs).
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Type several paragraphs describing how your models showed the effect of the rotation of Earth on day and night and the effect of Earth's tilt on seasons and regional climates. Discuss all components of your model, what you observed about darkness and light with your model, and what you discovered about the seasons and regional climates.
To show the effect of the rotation of Earth on day and night, a model could consist of a globe placed on a stationary object or a rotating platform to simulate the rotation of Earth on its axis, a light source for the sun would be present, and after rotating the model, all of these phenomena would be explained.
What is an "Earth model"?To make the model, different equipment is needed, such as a globe to represent the earth and a light source to represent the sun, so while rotating on its axis, the globe receives light at different places while other parts remain dark, and this makes for different time such as day and night, on earth due to the revolution around sun seasons are happened.
Hence, a model could consist of a globe placed on a stationary object or a rotating platform to simulate the rotation of Earth on its axis, a light source for the sun would be present, and after rotating the model, all of these phenomena would be explained.
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a If oxygen concentration is higher in the interstitial fluid than in the cytosol, which direction will oxygen move via simple diffusion?
[tex]O_2[/tex] molecules cross the membrane to the cytosol of the membrane in response to an increase in [tex]O_2[/tex] concentration.
What is an Equilibrium?Equilibrium means 'balance' which indicates that a chemical reaction represents a balance between the reactants and the products participating in the reaction which is also observed in some physical processes such as the melting point of ice at 0℃, ice and water, both exist in equilibrium.
It is well known that at equilibrium, the rates of forward and backward reactions are equal resulting in equal concentrations of reactants and products at equilibrium. As a result, we can draw the conclusion that it is untrue that when the photosynthetic reaction reaches equilibrium, the concentration of will start to decrease.
Thus, [tex]O_2[/tex] molecules cross the membrane to the cytosol of the membrane in response to an increase in [tex]O_2[/tex] concentration.
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if the diploid number of chromsomes for an organism is 16, each daughter cell after mitosis will contain
Answer:
16 chromosomes.
Type several paragraphs describing how your models showed the effect of the rotation of Earth on day and night and the effect of Earth's tilt on seasons and regional climates. Discuss all components of your model, what you observed about darkness and light with your model, and what you discovered about the seasons and regional climates.
Rotation is the movement of the earth on its axis that causes day and night. The tilt of the planet is responsible for the season and the climatic changes.
What do you mean by rotation?Rotation, or spin, is the circular movement of an object around a central axis. A two-dimensional rotating object has only one possible central axis and can rotate in either a clockwise or counterclockwise direction.
Rotation means the circular movement of an object around a centre. It is possible to rotate different shapes by an angle around the centre point. Mathematically, a rotation means a map.
A rotation is the movement of something through one complete circle. ... the daily rotation of the earth upon its axis. Synonyms: revolution, turning, turn, wheel More Synonyms of rotation. uncountable noun.
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HELPPPP ME ASAPPPP PLSSS SOMEONE DRAW IT. DUE TODAY.
The models of aerobic and anaerobic respiration are found n the attachment.
What is aerobic and anaerobic respiration?Aerobic respiration is a chemical reaction that converts carbohydrates into energy using oxygen. It is also known as oxygen metabolism, aerobic metabolism, and cell respiration.
Anaerobic respiration is respiration that does not use the molecule oxygen as an electron donor. The procedure still employs a respiratory electron transport chain even though oxygen is not the ultimate electron acceptor.
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During the oxidation of glucose, which of the following reactions ultimately produces the greatest number of ATP molecules? Glycolysis Oxidative phosphorylationKrebs cycle pyruvate dehydrogenase reaction
Most ATP molecules are eventually generated during the glucose oxidation process by oxidative phosphorylation.
By substrate-level phosphorylation, the cytoplasmic metabolic process of glycolysis generates a net of 2 ATP molecules. By substrate-level phosphorylation, the Krebs cycle, which occurs in the mitochondria, generates two ATP molecules for every glucose molecule. Although it connects glycolysis with the Krebs cycle, the pyruvate dehydrogenase process does not directly generate ATP molecules.
In contrast, during glucose oxidation, the bulk of ATP is produced via oxidative phosphorylation, which also occurs in the mitochondria. The electron transportation chain and the chemiosmotic production of ATP are both involved in this process. The electron transport chain creates a proton gradient within the mitochondria by electron transfer from NADH and FADH2 to oxygen. The ensuing proton motive force propels ATP synthase to produce ATP.
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the distance form point a to point b is known as
The distance from point A to point B is known as wavelength. The correct option is D.
What is wavelength?The distance between any two identical points or the adjacent crests in the adjacent cycles of a waveform signal that is conveyed in space or along a wire can be referred to as the wavelength. In wireless systems, the wavelength is typically expressed in meters (m), centimeters (cm), or millimeters (mm) (mm).
The Greek letter lambda () is typically used to represent wavelength. A wave's wavelength is determined by dividing its speed (v) by its frequency (f) in a given medium:
λ = v/f
Therefore, the correct option is D) wavelength.
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The missing options are:
A) amplitude. B) frequency. C) pitch. D) wavelength.
Humans, especially Americans, consume A LOT of meat. This uses up energy and resources. In the next box, write a prediction to answer the following questions: What role does the agricultural industry play in this? How can reducing meat in our diet help to save energy and natural resources?
*need asp ty*
Which of the following statements about the punctuated and gradual models of speciation is most accurate?
A) Although speciation can occur rapidly or gradually, the fossil record is not always detailed enough to determine how rapidly a particular speciation event proceeded.
B) The fossil record can only determine if the punctuated model is relevant or not to a particular speciation event.
C) Genetic differences can only determine if the gradual model is relevant or not to a particular speciation event.
D) The fossil record can be used to determine which speciation model best explains a particular speciation event.
The most accurate statement about punctuated and gradual models of speciation is: (A) Although speciation can occur rapidly or gradually, the fossil record is not always detailed enough to determine how rapidly a particular speciation event proceeded.
Speciation is the process of formation of a new species from the existing ones in the course of evolution. The newly formed species develops its own distinct characteristics which separates it from the existing one.
Fossils are the remains of the dead plants or animals that were buried deep down the earth millions of years ago. The fossils may be in the forms of casts, impressions, or some preserved traces. Since fossils take million of years to form this is why rapid speciation cannot form an elaborate fossil record.
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Jonah and Jana are siblings. Jonah has the genetic disorder cystic fibrosis, caused by inheriting one copy from each parent of a mutation in the CF gene. Jana does not have cystic fibrosis. Which of the following statements is/are true? (Select all that are true)
a)Jana does not have the gene that when mutant causes cystic fibrosis.
b)Jana has the gene that when mutant causes cystic fibrosis.
c)Jana has two copies of the allele that causes cystic fibrosis.
d)Jana does not have two copies of the allele that causes cystic fibrosis.
The assertions in option (b) & are true (d). Jana possesses the gene that, if mutated, results in cystic fibrosis. The cystic fibrosis-causing allele is not duplicated in Jana.
How long will someone with cystic fibrosis live?The life expectancy for CF patients born between 2017 and 2021 is currently 53 years, according to statistics from the 2021 CF Foundation Patient Registry. This is a significant increase from a decade ago when the life expectancy was 38. Nearly 60% of us are now above the age of 18.
What are the four primary signs of cystic fibrosis?The signs of CF
frequent lung infections, such as bronchitis or pneumonia. breathing difficulties like wheezing. Despite having a good appetite, you don't develop or acquire weight well. often oily, large stools, or trouble
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In guinea pigs, rough coat, R, is dominant over smooth coat. r. and black coat, B, is dominant over white, b. These traits are not linked. If a homozygous rough white animal is mated with a homozygous smooth black one, what will be the phenotypes of the F, and F, generations? 7. In guinea pigs, rough coat, R, is dominant to smooth coat, r, and black coat, B, is dominant to white, b. These traits are not linked. A guinea pig with a rough black coat is mated with one with a smooth white coat. There is one offspring with a smooth white coat. Determine the genotypes of the: a rough black parent Br+ Bb rrabb rr+bb b. smooth white parent smooth white offspring to inheritance Problem Solving 109
RrBb or RRBB are two potential genotypes for the parent who is rough black, while rrbb is the genotype of the parent who is smooth white.
For the first problem, the homozygous smooth black animal is rrBB, while the homozygous rough white animal is RRbb.
F1 generation: Because they have at least one dominant allele for each attribute, they will produce RrBb offspring, who will all be rough and black.F2 generation: If the F1 generation is permitted to cross itself, the progeny will have the following makeup: 9 rough black, 3 rough white, 3 smooth black, and 1 smooth white.The F2 offspring's genotypes will be as follows:
9/16 will have a rough, black coat and be RrBB.3/16 will be rough-coated in black and RrBb.3/16 will have a silky black coat and be rrBB.1/16 will have a silky white coat and be rrBb.Regarding the second problem:
The smooth white parent must be rrbb, while the rough black parent can be either RRBB or RrBB. The smooth white offspring possesses the genotype rrbb, indicating that each parent contributed a recessive gene for the coat texture and color.
As a result, the genotypes of the parents may be found in the table below:
To pass on the recessive b gene for white coat colour to the child, the rough black parent must be Rrbb.To have both recessive alleles for white coat colour and smooth coat texture, the smooth white parent must be rrbb.To know more about genotypes:
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Which of the following would be affected by an antibiotic that interferes with peptidoglycan synthesis?
A. the primary plant cell wall
B. the bacterial cell wall
C. the primary plant cell wall and the bacterial cell wall
C. the animal cell membrane
D. the plant and animal nuclear cell membrane
Answer: B
Explanation:
Bacterial cell walls have peptidoglycan, so an antibiotic that targets making peptidoglycan would disrupt the cell wall of the bacterial cell.
The thing that would be affected by an antibiotic that interferes with peptidoglycan synthesis is the bacterial cell wall that is present in Option B, as peptidoglycan is a unique structural component of bacterial cell walls.
What is peptidoglycan?Bacterial cell walls are complex structures that are essential for the survival of bacteria and that are composed of a variety of components, including peptidoglycan, and peptidoglycan provides structural support to the bacterial cell wall and protects the cell from changes in osmotic pressure, antibiotics that interfere with peptidoglycan synthesis can inhibit the formation of the peptidoglycan meshwork and weaken its structural integrity.
Hence, the thing that would be affected by an antibiotic that interferes with peptidoglycan synthesis is the bacterial cell wall that is present in Option B.
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Which of the following is not a proprioceptor?Tactile discsJoint Kinesthetic ReceptorMuscle SpindleTendon Organ
Tactile discs are not proprioceptors. Hence, the right option is 1st.
The dermis of the skin contains specialized skin cells called tactile discs, often referred to as Merkel cells, which are most frequently seen in the fingers and other touch-sensitive regions. They are crucial for our sense of touch since they are in charge of sensing mild touch and pressure.
On the other hand, proprioceptors are specialized sensory receptors that are found in muscles, tendons, and joints. They provide the central nervous system with information about the body's posture, motion, and muscle tension, enabling balanced movement. The muscle spindle, the Golgi tendon organ, and the joint kinesthetic receptor are the three different types of proprioceptors.
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According to a large-scale study, pregnant women's caffeine intake was linked to which of the following in their offspring? a) Increased behavioral problems
b) increase reproductive success.
According to a large-scale study, pregnant women's caffeine intake was linked to Increased behavioral problems
What are the effects of caffeine on pregnant women ?Limiting your caffeine intake is advised since excessive caffeine consumption during pregnancy may raise the risk of miscarriage or low birthweight. Numerous foods and beverages, such as coffee, tea, and cola, contain the chemical known as caffeine.
The consumption of caffeinated beverages has been linked to issues with fertility, and consumption during pregnancy has been linked to an increased risk of miscarriage, congenital abnormalities, foetal growth restriction, stillbirth, and behavioural issues in offspring over the long run.
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Inside a eukaryotic cell, the cell is divided into different areas, Each of these areas carries out a particular function for the cell. We call these areas:
Inside a eukaryotic cell, the cell is divided into different areas or compartments, each of which carries out a particular function for the cell. We call these areas organelles.
Organelles are specialized structures that are separated from the rest of the cell by a membrane. Each organelle performs a distinct set of functions that are critical to the cell's survival and proper operation.
The nucleus, for example, is the organelle that contains the cell's genetic material and regulates its activities, whereas the mitochondria are organelles that produce energy for the cell via cellular respiration.
The endoplasmic reticulum, which is involved in protein synthesis and lipid metabolism; the Golgi apparatus, which modifies, sorts, and packages proteins and lipids for transport; lysosomes, which contain digestive enzymes that break down waste materials and cellular debris; and the cytoskeleton, which provides structure and support for the cell and aids in cell movement and division, are other examples of organelles in eukaryotic cells.
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besides the method used by v. cholerae, other types of gene transfer exist. one important type is transduction, which can be generalized or specialized. choose whether the following examples illustrate generalized transduction, specialized transduction, or neither. drag and drop choices into the bins they describe
Transfer V. cholerae to medium containing ampicillin after one week of exposure to prey lacking the resistance gene. Transfer V. cholerae to medium containing ampicillin after one week of exposure to prey carrying the resistance gene, thus the correct options are B, D, F, and H.
Set up V. create cultures of cholerae that are ampicillin-susceptible and let them grow for a week alongside prey that carry the resistance gene on media without ampicillin. Set up V. Establish ampicillin susceptible cholerae cultures and permit them to develop for a week in the presence of prey lacking the resistance gene on medium without ampicillin. Generalized transduction in any portion of the host genome can be transmitted; transduction occurs in only a small portion of exposed cells. Specialized transduction in transduced DNA is integrated into the host as part of a prophage, transduction requires a temperate phage, and only certain areas of DNA may be transduced. Phage defects are not required for transduction. It is done by transducing particles, which can involve a dangerous phage.
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The complete question is:
Besides the method used by V. cholerae, other types of gene transfer exist. One important type is transduction, which can be generalized or specialized. Choose whether the following examples illustrate generalized transduction, specialized transduction, or neither. The introductory passage explains that Vibrio cholera bacteria may benefit from being able to obtain genes from their prey. What would be the best way to test whether they can benefit within one week of exposure to prey with a gene that confers resistance to ampicillin, an antibiotic that is commonly used in microbiology laboratories? Choose all of the steps that you should include
A. Set up V. cholera cultures that are susceptible to ampicillin and allow them to grow for a week in the presence of prey lacking the resistance gene on a medium that contains ampicillin.
B. Transfer V. cholerae that have been exposed for one week to prey lacking the resistance gene to medium with ampicillin
C. Set up V. cholerae cultures that are susceptible to ampicillin and allow them to grow for a week in the presence of prey lacking the resistance gene on a medium that does not contain ampicillin.
D. Transfer V. cholera that have been exposed for one week to prey with the resistance gene to medium with ampicillin.
E. Set up V. cholerae cultures that are susceptible to ampicillin and allow them to grow for a week in the presence of prey that have the resistance gene on a medium that contains ampicillin.
F. Set up V. cholera cultures that are resistant to ampicillin and allow them to grow for a week in the presence of prey lacking the resistance gene on a medium that does not contain ampicillin.
G. Set up V. cholerae cultures that are resistant to ampicillin and allow them to grow for a week in the presence of prey with the resistance gene on a medium that does not contain ampicillin.
H. Set up V. cholera cultures that are susceptible to ampicillin and allow them to grow for a week in the presence of prey that have the resistance gene on medium that does not contain ampicillin
in rabbits, long hair and black fur are produced by the dominant alleles l and b, which assort independently. the genotype ll produces short hair and the genotype bb
Long hair and black fur are created in rabbits by the dominant alleles L and B, which assort separately. The genotype ll has short hair, while the genotype bb has white fur.
How do several alleles influence rabbit coat colour?A set of several alleles influences coat colour in rabbits in the following way: All other alleles are subordinate to C, which results in full colour. The chinchilla phenotype is caused by the cch allele, which is dominant over all other alleles except C. The Himalayan coat colour is caused by the ch allele, which is exclusively dominant in ca (albino).
In a rabbit population, black is the dominant hue while white is recessive. Fur colour in rabbits follows a co-dominance pattern.
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4) Many tiny plants can be seen developing asexually along the edge of the mother-of-thousands
plant leaf, as shown in the photo below. The tiny plants eventually drop to the ground and grow
into new plants of the same species.
One way this form of reproduction differs from sexual reproduction is
(1) more genetic variations are seen in the offspring
(2) there is a greater chance for mutations to occur
(3) the offspring and the parents are genetically identical
(4) the new plants possess the combined genes of both parents
(3) the offspring and the parent are genetically identical.
In asexual reproduction, the offspring are produced by a single parent and are identical to the parent in their genetic makeup. They do not receive genetic material from a second parent, as is the case in sexual reproduction. This results in a lack of genetic diversity among the offspring, as they are all essentially clones of the parent plant.
Twenty-year-old Jewell was a high school athlete who is now in her sophomore year of college. The transition from high school to college was challenging for Jewell and she rarely exercised her freshman year of college. Jewell has now started a training program with a goal of running in a 10K race in three months. Which of the following adaptations have been found following several months of endurance training? Multiple Choice A. increased use of muscle glycogen as an energy source B. Decrease in muscle cell mitochondria density C. Increase in GLUT4 receptors D. Decrease in VO2 max
The adaptations have been found for several months of endurance training is increase in GLUT4 receptors. Option C is correct.
Endurance training leads to various adaptations in the body to support increased oxygen delivery and utilization during exercise. One of these adaptations is an increase in the number of GLUT4 receptors in the muscle cells.
GLUT4 is a glucose transporter protein that is responsible for bringing glucose into the muscle cells from the bloodstream. The increase in the number of GLUT4 receptors in the muscle cells following endurance training allows for increased glucose uptake during exercise, which can help delay fatigue and improve endurance performance.
Option A is incorrect because endurance training leads to an increased capacity to use fat as an energy source during exercise, not muscle glycogen.
Option B is incorrect because endurance training actually increases the density of mitochondria in the muscle cells. Mitochondria are responsible for aerobic energy production, and increased mitochondrial density is a key adaptation to endurance training.
Option D is incorrect because VO₂ max, which is the maximum amount of oxygen that a person can use during exercise, typically increases with endurance training, not decreases.
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Which of the following is the correct sequence that a newly synthesized secretory protein would follow until it is exported from the cell?
a. Smooth ER - Rough ER - Golgi apparatus - Cell membrane
b. Golgi apparatus - Rough ER - Cell membrane
c. Golgi apparatus - Smooth ER - Cell membrane
d. Rough ER - Golgi apparatus - Cell membrane
e. Smooth ER - Golgi apparatus - Cell membrane
A secretory protein that has just been created should be in the following order: Golgi apparatus, cell membrane, and rough ER. Hence option 'd' is correct.
Give examples of secretory proteins.A secretory protein is one that, following cell synthesis, is released into the external environment. Examples include salivary pepsin, amylase, digestive enzymes, antibodies, and a small amount of hormones.
Secretory proteins are created by what?Ribosomes located there at cytosolic face of a ER in mammalian cells produce secretory proteins at such an average rate of 3-5 amino acids every second. A wide variety of cellular proteins are produced, folded, and delivered by the secretory route.
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Identify the tissue in the image, which is comprised of short, spindle-shaped cells that are found in the walls of blood vessels and in digestive, respiratory, urinary, and reproductive organsO gap junctionO skeletal muscleO basement membraneO smooth muscle
In addition to being present in the walls of blood arteries, smooth muscle is also found in the cell, lungs, urinary, and reproductive systems.
It has short, spindle-shaped cells and is present as in walls of blood vessels, as well as in the digestive, respiratory, urinary, and reproductive organs?The inner organ walls of the abdomen, oesophagus, stomach, blood vessels, and other internal organs contain smooth muscle, a category of contraction that authorizes without any voluntary control. Smooth muscle is surrounded by a thin form of layers and is composed of cassette, longer provides cells with only one nucleus.
What type of tissue is present in the walls of the digestive, respiratory, urinary, and reproductive organs?It is made up of a thin, continuous layer of tightly packed cells and minimal intercellular matrix. In the body, epithelial tissues coat both the inner and exterior surfaces of blood arteries and organs.
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