The main difference between plant and animal cells during mitosis is the process of cytokinesis. Animal cells undergo cytokinesis through the formation of a cleavage furrow, which is the constriction of the cell membrane at the equator of the cell, which eventually separates the two daughter cells.
The plant cells undergo cytokinesis through the formation of a cell plate. During telophase, the vesicles from the Golgi apparatus fuse at the centre of the dividing cell, forming a cell plate that gradually grows outward towards the cell walls, separating the two daughter cells.
Another difference between plant and animal cells during mitosis is that plant cells have a rigid cell wall that must be split during cytokinesis, while animal cells have a flexible cell membrane that can easily form a cleavage furrow. Additionally, plant cells have a unique organelle called the spindle pole body, which helps to organize the spindle fibres during mitosis.
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20 In pea plants, round pods are dominant to wrinkled and green pods are dominant to yellow. A plant with
wrinkled and homozygous green pods is crossed with a plant that is heterozygous for both traits.
Determine the phenotypic ratio. If they have 8 offspring, how many will express both dominant traits?
The phenotypic ratio of the offspring from the cross between a wrinkled, homozygous green pea plant and a heterozygous plant for both traits is 2 round-green : 2 round-yellow : 1 wrinkled-green : 1 wrinkled-yellow. Out of 8 offspring, 2 will express both dominant traits.
The Punnett square for the cross between a wrinkled, homozygous green pea plant (rrGG) and a heterozygous plant for both traits (RrGg) is:
R r
G
G|RrGG|RrGg
g|RrGg|rrGg
From the Punnett square, we can see that the possible offspring genotypes are RrGG, RrGg, rrGg, and rrGG. The corresponding phenotypes are:
Round, green: RrGG and RrGg
Round, yellow: rrGg
Wrinkled, green: rrGG
Wrinkled, yellow: none
So the phenotypic ratio is 2 round-green : 2 round-yellow : 1 wrinkled-green : 0 wrinkled-yellow, which can be simplified to 2:2:1:0. Out of 8 offspring, the 2 round-green individuals express both dominant traits (round and green).
What is phenotypic ratio?
Phenotypic ratio refers to the ratio of different physical traits or characteristics that are expressed in offspring resulting from a genetic cross. It describes the observable traits or features that are determined by the genotype (genetic makeup) of an individual.
What are genotypes and phynotypes?
Genotype and phenotype are two fundamental concepts in genetics that describe the genetic makeup and physical appearance of an organism, respectively.
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what part of the eye protects the pupil and redirects light?
The iris is the part of the eye that protects the pupil and redirects light. The
iris is a thin, circular structure located between the cornea and the lens, and it gives the eye its characteristic color. The opening in the center of the iris is the pupil, which regulates the amount of light entering the eye.
The iris contains smooth muscle fibers that contract or relax to adjust the size of the pupil in response to changes in light levels. The iris also helps to redirect light by changing the angle at which it enters the eye, ensuring that it falls on the retina in a way that allows for clear vision.
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Which of the following is the best example of an adaptation that improves an organism's "fitness"?
A. Dark-colored lizards living on light rocks.
B. A thick coat of fur on animals living in the hot desert.
C. Lizards with sticky toe pads live among tall trees.
Answer:
C. Lizards with sticky toe pads live among tall trees. is the best example of an adaptation that improves an organism's "fitness". The adaptation allows the lizards to climb and live in their arboreal habitat, increasing their chances of survival by avoiding predators and accessing resources.
A scientist performed an experiment using various lengths of wire, all with the same cross-sectional area. The resistance of each length of wire was measured. The scientists results appear in the data table below.
Length Resistance
(meters)
(ohms)
Which of the following is the best conclusion to draw from this experiment?
O Resistance increases as the cross-sectional area of the resisting material increases.
O Electrical signals increase in power consumption as the length of wire increases
O Electrical signals decrease in strength as the distance they travel increases
Resistance increases as the total length of the resisting material decreases
5.1
11.0
16.0
18.0
23.0
1.6
3.8
4.6
5.9
7.5
Answer:
a
Explanation:
MULTIPLE CHOICE QUESTION
Which of the following are components of most
viruses? Select all that apply.
A. Lipid envelope
B. Cell wall
C. Attachment proteins or
envelope proteins (sometimes
also called virus spikes)
D. protein capsid which contains.
the genetic material.
E. DNA or RNA as genetic
material
Following are the components of most viruses : A. Lipid envelope; C. Attachment proteins or envelope proteins (sometimes also called virus spikes); D. Protein capsid which contains the genetic material; E. DNA or RNA as genetic material
What are the components of viruses?Components A, C, D, and E are found in most viruses. However, component B, the cell wall, is not found in viruses as they are acellular and do not have cell walls.
Viruses are composed of a nucleic acid, RNA or DNA but never both. - All viruses have protein coat or shell that surrounds and protects the nucleic acid core. Some viruses have lipid envelope or membrane surrounding nucleocapsid core and the source of the envelope is from membranes of the host cell.
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A judge allowed a DNA analysis to be entered as evidence in court. Which of the following statements BEST explains why the use of DNA analysis is so effective in establishing identity?
The procedure fro DNA fingerprinting is an accurate series of simple techniques.
The probability of two people having similar DNA fingerprints is small.
The purpose of DNA fingerprinting is to match sections of base pairs.
The percentage of identical DNA within a species is high.
As the probability of two people having similar DNA fingerprints is small, the judge allowed DNA analysis to be entered as evidence in court.
DNA analysis has become one of the most efficient methods of identifying and proving identity. DNA analysis is based on a series of simple and accurate techniques that make it so efficient.
The use of DNA analysis in establishing identity is so effective due to the probability of two people having similar DNA fingerprints is small.
In fact, the odds are so small that DNA analysis has been utilized as a definitive method of determining guilt in criminal cases.
In summary, the use of DNA analysis in establishing identity is so effective because the probability of two people having similar DNA fingerprints is small.
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What are the disadvantages of sideway-facing eyes?
Answer:
The disadvantages of sideways-facing eyes include limited depth perception, vulnerability to predators, difficulty with tracking moving objects, reduced binocular vision, and increased susceptibility to eye damage.
Explanation:
Sideways-facing eyes, also known as laterally placed eyes, are found in animals such as horses, cows, and deer. While these types of eyes have advantages for these animals, they also have some disadvantages.
Limited depth perception: Sideways-facing eyes have a narrower field of vision compared to forward-facing eyes. This can limit the ability to accurately judge the distance of objects in front of them, making it harder to navigate in complex environments.
Vulnerability to predators: Animals with sideways-facing eyes are more vulnerable to attacks from predators since they have a reduced ability to see approaching danger from the sides. This can make it harder for them to escape from predators or detect predators approaching from the sides.
Difficulty with tracking moving objects: Sideways-facing eyes have a limited ability to track moving objects. This can make it harder for animals to catch prey or avoid predators that are moving quickly.
Reduced binocular vision: Binocular vision, which is the ability to use both eyes together to create a single, three-dimensional image, is reduced in animals with sideways-facing eyes. This can make it harder for them to accurately judge the distance and speed of objects in front of them.
Increased susceptibility to eye damage: Animals with sideways-facing eyes are more susceptible to eye damage since their eyes are located on the sides of their head and are more exposed to the environment. This can lead to increased risk of injuries from objects or collisions with other animals.
In the brown alga Laminaria, the large, leafy-looking thallus
A) grows from a zygote.
B) is a sporophyte.
C) has sporangia.
D) is diploid.
E) ALL OF THE ABOVE
E) all of the above.
In brown algae laminaria, the lrge leafy looking thallus is all of the above as it grows on zygote which is formed by the fusion of gametophye of male and female, it has sporophyte and a sporangia which is diploid.
Laminaria's sporophyte is a complex, leathery, parenchymatous thallus and there is division of laminaria into a blade, a stipe and a holdfast.
It is a temperate brown alga belonging to the group known as kelps. The location of this brown algae is dense underwater forests near the shore in temperate regions.
This brown algae are exclusively multicellular and found in marine habitats.
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Describe the three different types of bipedalism. For each one, be sure to discuss the frequency of bipedal locomotion, describe the extent of bipedal adaptations, provide at least one sample primate who practices this type of bipedalism, and describe why the sample primate uses this form of bipedalism
There are three main types of bipedalism: facultative, obligate, and facultative-obligate.
Facultative bipedalism is the most common, and it occurs when primates walk bipedally but also move around on all fours. Examples of primates with facultative bipedalism include baboons, chimpanzees, and gorillas. These primates use bipedalism as a way to transport objects, to feed, and to reach things that are otherwise out of reach.
Obligate bipedalism occurs when primates move around on two legs only and do not move around on all fours. Humans are a classic example of obligate bipedalism, as we are almost exclusively bipedal when we move around. Other primates who exhibit obligate bipedalism include macaques, vervets, and lorises. They use bipedalism to navigate through dense forests, which is helpful for accessing fruits and other resources in the treetops.
Finally, facultative-obligate bipedalism occurs when primates occasionally move around on all fours and at other times move around on two legs only. Gibbons and siamangs are examples of primates who exhibit facultative-obligate bipedalism. They use bipedalism as a way to move quickly between trees, and they use all fours when they are climbing.
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Which structure immediately encloses viral nucleic acid? Capsid, nucleic acid. Identify all the components of the nucleocapsid. False. True or False.
Viruses safeguard their genetic material by encasing the viral nucleic acid within a protein shell (capsid), a process known as genome packing. The viral nucleic acid (DNA or RNA) contains the genetic instructions for protein synthesis in order to create new viruses, i.e. the virus's genome. When a virus identifies a target cell, the nucleic acid is transferred into it.
The virus composition is made up of three major components: nucleic acid, capsid, and envelope. A virus's nucleic acid is located within its inner core and includes the genetic material for protein synthesis and replication. Viruses' hereditary substance can be single-stranded or double-stranded DNA or RNA. When a virus infects a recipient cell, the nucleic acid is replicated.transferred into the recipient cell. The viral nucleic acid enters the nucleus and directs the cell to create proteins that are assembled to produce more virus cells.
Viruses safeguard their genetic material by enclosing the viral nucleic acid inside a protein shell (capsid), a process known as genome packaging. Viruses package their genome in one of two ways: either they co-assemble their genetic material with the capsid protein, or they first build an empty casing (procapsid) and then pump the genome inside the capsid with a molecular engine powered by ATP hydrolysis. During packing, the viral nucleic acid is concentrated to a very high quantity by carefully arranging it in concentric layers inside the capsid. In this part, we will discussfirst give an overview of the different strategies used for genome packaging to discuss later some specific virus models where the structures of the main proteins involved, and the biophysics underlying the packaging mechanism, have been well documented.
Which of the following is/are required in order for an endosome to be transported from the plasma membrane to the Golgi complex? (Select all that apply!) GTP Kinesin Myosin Microtubules Dynein Actin ATP
The following are required in order for an endosome to be transported from the plasma membrane to the Golgi complex: GTP, Kinesin, Dynein, and Microtubules. The correct options are A, B, D and E.
An endosome is a membrane-bound compartment that is formed through the internalization of material from the plasma membrane through the process of endocytosis. Endosomes are known to sort their cargo and then subsequently recycle it back to the plasma membrane or traffic it to lysosomes for degradation. Endosomes are transported from the plasma membrane to the Golgi complex by a motor protein called kinesin. Kinesin is a plus-end-directed motor protein that is responsible for transporting cargo towards the plus end of microtubules. Dynein is another motor protein that transports cargo towards the minus end of microtubules. GTP is an energy-rich molecule that is required for the movement of the motor proteins, kinesin and dynein. This energy is used to power the movement of the motor proteins along microtubules.
Actin and Myosin are motor proteins that are responsible for transporting cargo along actin filaments. They are not involved in the transport of endosomes from the plasma membrane to the Golgi complex. ATP is the energy currency of the cell, and it is required for the movement of motor proteins. Therefore, the correct options are A, B, D, and E.
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A genetic mutation causes the three-dimensional shape of a photosynthetic enzyme to change, but the active site is unaffected. Which of the following is/are likely the result(s)? Click or tap a choice to answer the question. There would be no effect on normal enzyme function. This enzyme's shape is not affected by pH. The associated metabolic reaction takes The enzyme now must use an induced fit reaction. more energy The substrate molecules cannot attach to the enzyme.
A genetic mutation causes the three-dimensional shape of a photosynthetic enzyme to change, but the active site is unaffected, the likely result of this would be that there would be no effect on normal enzyme function. So the correct answer is the first option.
Photosynthesis is the process by which green plants and some other organisms convert light energy into chemical energy in the form of glucose or other carbohydrates. The process occurs in chloroplasts of green plants, algae, and cyanobacteria (blue-green algae). During photosynthesis, the energy from the sun is absorbed by chlorophyll and other pigments in the plant's chloroplasts. This energy is then used to power a sequence of chemical reactions that convert carbon dioxide and water into glucose, a type of sugar that plants and other organisms use as a source of energy and a building block for other important molecules.
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b)(i) Propose a different renewable resource to use that would be a realistic solution to generating electricity without using fossil fuels or hydroelectric power in a grassland ecosystem.-Solar energy/PV cells-Biomass burning/ethanol production-Wind energy/wind turbines
Renewable energy sources are becoming more important as a way to mitigate climate change, and finding solutions to generating electricity without using fossil fuels or hydroelectric power is increasingly necessary. Wind energy/wind turbines can be a solution for generating electricity in a grassland ecosystem without using fossil fuels.
Wind energy: Wind turbines generate electricity by harnessing the kinetic energy of wind. The use of wind energy is an eco-friendly way to generate electricity because it produces no greenhouse gases and has no environmental impact. Wind turbines are widely used in many countries, and they can be installed in grasslands since they require a large open space to operate.
Biomass burning/ethanol production: This is another renewable energy source that can be used in grassland ecosystems. Biomass refers to organic matter that can be burned to produce heat or electricity. Ethanol can be produced from corn or sugarcane, and it can be used as fuel. The drawback of this option is that the burning of biomass releases carbon dioxide and other greenhouse gases into the atmosphere.
Solar energy/PV cells: Solar panels generate electricity by converting sunlight into electricity. They are an eco-friendly way to generate electricity, but they are not suitable for grassland ecosystems since they require a large open space to operate, and grasslands have a lot of shading.
In summary, solar energy, wind energy, and biomass burning/ethanol production are all good solutions to generating electricity without using fossil fuels or hydroelectric power. However, wind energy/wind turbine is the best option for grassland ecosystems. They are cost-effective and eco-friendly, and they require a large open space to operate.
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Select all the knee ligaments that are deep to the articular capsule and prevent anterior and posterior movement of the femur on the tibia Check All That Apply Fibular collateral ligament Tibial collateral ligament Anterior and posterior cruciate ligaments Lateral and medial menisch
The knee ligaments that are deep to the articular capsule and prevent anterior and posterior movement of the femur on tibia are
What are knee ligaments?Knee ligaments are tough bands of tissue that connect the bones in the knee joint, providing stability and supporting the joint during movement.
The knee ligaments that are deep to the articular capsule and prevent anterior and posterior movement of the femur on the tibia are the anterior and posterior cruciate ligaments.
The other options mentioned are either located outside the articular capsule or do not prevent anterior and posterior movement of the femur on the tibia.
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Show DNA replication: TCA AAG GAC TAT GGC TTC *
ylidenenorbornadiene carboxylates: experimental kinetic analysis of a nucleophile-induced fragmentation reaction
The experimental kinetic analysis of a nucleophile-induced fragmentation reaction of ylidenenorbornadiene carboxylates is a type of reaction that involves the combination of a base and an electrophile, resulting in the breaking down of a large molecule into smaller ones.
The reaction occurs in two steps:
the formation of the ylidenenorbornadiene carboxylate followed by the fragmentation of the complex into smaller molecules. In order to determine the rate of this reaction, kinetic analysis is used to measure the rate of product formation as a function of time. The kinetic parameters obtained from the experiments, such as the reaction rate constants and activation energies, can be used to further understand the reaction mechanism.
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write the relationship between cells tissue and organs in human body
Which statement is true regarding tidal volume (Vr)? a. It is the volume breathed in each breath. b. It is the volume breathed in each minute. c. It is unaffected by the frequency of breathing
The tidal volume (Vt) refers to the volume of air breathed in with each breath. The correct option is (a).
This is the amount of air that a person inhales or exhales during normal, unforced breathing. Inspiratory reserve volume (IRV), expiratory reserve volume (ERV), and residual volume (RV) are the other pulmonary volumes that make up the tidal volume.
When the tidal volume is multiplied by the respiratory rate, the minute ventilation (VE) is calculated. The frequency of breathing, also known as respiratory rate (RR), determines how much CO2 is eliminated from the body.
The amount of CO2 removed from the body is proportional to the respiratory rate. The respiratory rate increases in order to increase the volume of CO2 removed from the body.
The factors that influence tidal volume are age, gender, weight, exercise, anxiety, and smoking. The tidal volume may be raised by anxiety, exercise, and smoking, while it may be reduced by age, gender, and weight. Furthermore, deep breathing exercises are a popular method of increasing tidal volume to help with breathing difficulties.
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in logistic growth, how does population growth change as the population nears its carrying capacity?
As the population approaches its carrying capacity, population growth begins to slow and eventually stops. This is because the carrying capacity is the maximum population size an environment can sustain, so when the population reaches that size, it is no longer able to grow. Logistic growth models this behavior by decreasing the growth rate as the population approaches the carrying capacity. As a result, the population growth rate slows and eventually stops as the carrying capacity is reached.
In logistic growth, population growth slows down as the population nears its carrying capacity.
What is Logistic growth?
Logistic growth refers to the growth of the population, which increases gradually initially and then reaches its maximum potential limit. At a certain point, the growth rate starts to slow down, and the population stabilizes, reaching its carrying capacity. Logistic growth is a type of growth pattern of a population that considers the carrying capacity of the ecosystem. Carrying capacity is the maximum number of individuals that an environment can support. It is the maximum population size of a species that can be supported by a given environment. It depends on the available resources in the ecosystem, such as water, food, and shelter.
What happens as the population approaches the carrying capacity?
As the population approaches the carrying capacity, the growth rate starts to slow down. The population growth rate slows down due to the scarcity of resources that support the population. Thus, the population growth slows down and finally stabilizes at the carrying capacity. The logistic growth model is a mathematical representation of population growth that shows how the population will grow in a given environment with limited resources. It is a widely used model in ecology and biology to understand the growth pattern of a population.
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Someone help me please
Hypersecretion of thyroxine in the thyroid gland results in suppression of TSH (thyroid-stimulating hormone) from the pituitary gland.
Hyposecretion of cortisol in the adrenal glands results in an increase in the secretion of ACTH (adrenocorticotropic hormone) from the anterior pituitary gland.
What is function of adrenocorticotropic hormone?Adrenocorticotropic hormone (ACTH) is a hormone produced and secreted by the anterior pituitary gland in the brain. Its primary function is to stimulate the production and release of cortisol, a steroid hormone, from the adrenal cortex, which is the outer layer of the adrenal glands located above the kidneys.
ACTH is released in response to stress, low blood sugar levels, and other factors that signal the need for increased cortisol levels in the body. It acts on the adrenal cortex to increase the synthesis and release of cortisol into the bloodstream, which then helps the body cope with stress, regulate blood sugar levels, and maintain normal immune function.
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Choose ONE of the following situations and describe IN DETAIL the anticipated effect on BLOOD PRESSURE and ALL the physiological basis of the response.
In your discussion please make sure to include the role of nervous system (Cardiac center (Sympatheic and parasympatheic centers), and/or vasomotor center, as well as the roles that hormone (s) will play in regulating the blood pressure.
(1) a high-salt diet,
(2) a blow on the head that damages (disables) the vasomotor center,
(3) an attack by a mugger, and
(4) a hypothalamic tumor resulting in excess ADH production.
All of the given factors affect blood pressure such as a high-salt diet increase blood pressure, a blow on the head that damages the vasomotor center decreases the blood pressure, etc.
What is the effect on blood pressure?
A high-salt diet will lead to an increase in blood pressure due to an increase in the osmolarity of the extracellular fluid. This causes an increase in the activity of the sympathetic nervous system, which leads to an increase in heart rate, and constriction of the peripheral blood vessels, leading to an increase in blood pressure.
A blow to the head that damages the vasomotor center will lead to an inability to control the sympathetic and parasympathetic activities of the cardiac center, leading to an inability to maintain proper control of the heart rate and vascular resistance. This will lead to a decrease in blood pressure.
An attack by a mugger can lead to a sudden increase in the activity of the sympathetic nervous system. This will lead to an increase in heart rate, and vasoconstriction, leading to an increase in blood pressure.
A hypothalamic tumor resulting in excess ADH production will lead to an increase in the osmolarity of the extracellular fluid, leading to an increase in the sympathetic activity of the cardiac center, leading to an increase in heart rate, and vasoconstriction, leading to an increase in blood pressure.
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Which of these gases diffuses the fastest under the same conditions? a. HCl b. H2 c. Cl2 d. He
Under the same conditions, He (helium) would diffuse the fastest.
This is because diffusion rate depends on several factors, including the size and mass of the particles and the temperature and pressure of the system.
Helium has the smallest atomic radius and the lowest atomic mass of the four gases listed, which means that its particles are lighter and smaller than those of the other gases. As a result, helium atoms have a higher average speed and are able to move more quickly through a medium than larger, heavier particles like those of HCl (hydrogen chloride), H2 (hydrogen), and Cl2 (chlorine).
Additionally, temperature and pressure can affect the diffusion rate of gases, but assuming the same conditions for all four gases, the difference in mass and size would be the dominant factor in determining their diffusion rates.
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There is some evidence that pharyngeal gill slits occur in certain species of echinoderms that appear early in the fossil record. If confirmed, what do these data suggest?
The presence of pharyngeal gill slits in certain species of echinoderms that appear early in the fossil record would suggest that these structures are not unique to chordates and that they may have evolved independently in different lineages.
One of the distinguishing characteristics of chordates are pharyngeal gill slits, which are employed for breathing or filter feeding. It would imply that they perform a comparable purpose in these species if echinoderms, which are not chordates, also evolved these structures. This would strengthen the argument that evolution is a branching process rather than a linear path, with numerous independent adaptations taking place in various lineages throughout time.
It's crucial to remember that the existence of these features in early echinoderms does not necessarily mean that echinoderms and chordates have a direct evolutionary connection. Instead, it would imply the evolution of identical structures in several lineages in a convergent fashion. To validate the existence of pharyngeal gill slits in echinoderms and to comprehend the consequences for our comprehension of the evolution of these features in various species, additional study and investigation are required.
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Air moves out of the lungs when the pressure inside the lungs is
A. less than the pressure in the atmosphere
B. greater than the pressure in the atmosphere.
C. equal to the pressure in the atmosphere.
D. greater than the intra-alveolar pressure
The right answer is B, air moves out of the lungs when pressure inside the lungs is higher than atmospheric pressure.
How do the lungs' airways and pressure work together?When the pulmonary pressure is higher than the atmospheric pressure, air is forced out of the lungs. When the internal pulmonary pressure is lower than the external atmospheric pressure, air enters the lungs (inspiration).The environment and the gases in the lungs have different pressures, which causes air to move. Like other gases, air also travels from a high-pressure area to a low-pressure area. The pressure changes that lead to ventilation are caused by the muscular breathing movements and elastic tissue rebound.For more information on air flow into lungs kindly visit to
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what is the point of biology if she dont rlly teach anything
any difference in traits between individual and organisms
Individuals are unique members of a species that exhibit variations in their physical, behavioral, and genetic traits. Organisms are living entities that exhibit certain characteristics that define them as being alive.
While individuals and organisms are related concepts, there are some differences in their traits. Individuals of a species may exhibit a wide range of physical and behavioral traits that are influenced by genetic, environmental, and other factors. For example, two individual humans may differ in height, eye color, and personality traits. Similarly, two individual plants of the same species may differ in leaf shape, flower color, and growth rate.
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B-lymphocytes are categorized as part of the adaptive branch of the immune system for all of the following reason but one. Which of the following is not one of the reasons B-lymphocytes are considered part of the adaptive immunity? They are a first line of defense that can begin killing pathogens immediately.
B-lymphocytes are considered part of adaptive immunity because they produce antibodies in response to specific antigens. The following is not one of the reasons B-lymphocytes are considered part of adaptive immunity:-
"They are a first line of defence that can begin killing pathogens immediately."
Antibodies produced by B-lymphocytes are immunoglobulins, and they have two primary functions. They can neutralize pathogens' effects by adhering to them and preventing them from adhering to or entering cells. They also attach to and activate the complement cascade, which leads to the destruction of pathogens.
Adaptive immunity is a kind of immunity that requires time and exposure to pathogens to establish a precise immune response.
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Fun fact
Bananas are curved because they grow towards the sun ☀️
Answer:
True
Explanation:
It's because of the sun! Bananas are curved so they can retrieve sunlight. Bananas go through a process called 'negative geotropism'.
Hope it helped! :)
Some protists, such as amoebas, are surrounded only by their plasma membrane whereas others such as diatoms and foraminifera are surrounded by?
The protists such as diatoms and foraminifera are surrounded by protective glassy shells of silica.
Diatoms are single-celled algae that come in a variety of shapes and sizes. They're found in both freshwater and saltwater environments, and they're a crucial part of aquatic food chains.
The diatom cell is bordered by a silica shell, which gives it a distinctive frustule or "valve" shape.
Foraminifera is a kind of single-celled protist with a shell, similar to diatoms. Foraminifera shells are made up of calcium carbonate or agglutinated material (particles of sand or other hard materials).
In conclusion, the protists diatoms and foraminifera are surrounded by silica or calcium carbonate shells, whereas others such as amoebas are only surrounded by their plasma membrane.
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Which codon or codons are identical in all three frogs?
The codon or codons that are identical in all three frogs are AUG.
A codon is a group of three nucleotides in RNA or DNA. A codon sequence establishes the order of amino acids in a protein during protein synthesis. The genetic code is made up of a total of 64 codons. Because there are only 20 amino acids that are commonly used to create proteins, some amino acids are represented by more than one codon. AUG, for example, is one of three codons that encode methionine.
AUG is the codon that is common to all three frogs. The start codon AUG is the first codon of most mRNA and signifies the beginning of the translation process in eukaryotic cells. In addition to encoding methionine, it also functions as an internal ribosome entry site (IRES), which allows translation to proceed even in the absence of a 5′ cap on the mRNA transcript.
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