Answer:
Because it is important to support the body to function properly
Which is an innovation of gymnosperms?
Gymnosperms are the first seed plants.
Gymnosperms are the first flowering plants.
Gymnosperms are the first vascular plants.
Gymnosperms are the first spore-bearing plants.
An inmovatuon of gymnosperms is that gymnosperms are the first flowering plants which produce seeds and fruits from their flowers.
What are gymnosperms?Gymnosperms are flowering plants which produce seeds and fruits from their flowers.
The development of flowers in gymnosperms was very significant as it helped in the propagation of the plants.
The flowers attracted pollinators and the fruits too attracted seed dispersers. As a result gymnosperms became dominant among plants.
Therefore, gymnosperms are the first flowering plants.
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Answer:
B. first flowering plants
Explanation:
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Which description bets fits the definition of behavior?
A. How an organism responds to internal and external stimuli.
B. An equal but opposite reaction.
C. When an adolescent organism is acts poorly.
D. How an animal acts when it is threatened.
Answer:
i think its D!
Explanation:
The description that best fits the definition of behavior is how an organism responds to internal and external stimuli. Thus, the correct option is A.
What is Behavior?A behavior may be defined as the observable response of an organism in response to numerous external or internal stimuli.
The organisms may possess some behaviors that are directly inherited from their parents. These behaviors are known as innate or inborn behaviors. while some are learned behavior. Some are mixed in nature.
Therefore, the description that best fits the definition of behavior is how an organism responds to internal and external stimuli. Thus, the correct option is A.
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The lac operon - TRUE or FALSE: Group of answer choices Before the induction of the lac operon, lactose transporters are completely absent from the cell membrane.
Answer: False.
Explanation:
The lac operon is an operon required for the transport and metabolism of lactose in Escherichia coli bacteria, as well as in some other enteric bacteria. It has three adjacent structural genes, a promoter, a regulator and an operator. The lac operon is regulated by several factors, including the availability of glucose and lactose.
The lac operon is under a type of negative regulation, where the genes can always be transcribed, except when the Lac I repressor protein is attached to the operating region, for which it presents a high affinity. In this case, the promoter of the lac gene I is constitutive, for which the Lac I protein is permanently expressed and remains united in tetramer form to the operative region, preventing the transcription of the structural genes.
In the presence of lactose, lactose is the inductor of the operon. It is capable of binding to the repressor protein Lac I and generating a conformational change that decreases its affinity for the operating region. In this way, the operator region remains free, RNA polymerase can freely transcribe the structural genes and β-galactosidase can degrade lactose to glucose and galactose.
In absence of lactose, Lac I repressor protein maintains its high affinity for the operator region, preventing RNA polymerase to transcribe structural genes. In this way, the system remains closed with the consequent energy saving for the bacteria.
The lac operon is an inducible circuit which encodes the genes for the transport of lactose into the cell. But before the induction of it (in absence of lactose), the lactose transporter is not really completely absent from the membrane. There are some active lactose carriers at the basal level.
two scientists do not agree on which type of grocery ba is better for the environment
Answer:
The most likely outcome of their disagreement is the use of cloth tote bags.
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If you have a density of 100 kg/L, and a mass of 1000 units, what are the mass units? and what is the volume?
Answer: Volume is 10
Explanation: v=m/p
= 1000 kilogram/100kilogram/cubic meter
= 10 cubic meter
Answer:
Volume is 10
Explanation:
Lactase is an enzyme that breaks down a sugar found in dairy products known as lactose. Some people are lactose intolerant, and this can be due to not having enough lactase production. People who are lactose intolerant may not feel well after eating foods containing lactose.
identify enzyme:
identify substrate:
Describe the relationship between the substrate and enzyme in the scenario:
Answer:
Identify enzyme: Enzymes are named by adding the suffix -ase to the name of the substrate that they modify or the type of reaction they catalyze(dehydrogenase, decarboxylase)
Identify substrate: the substrate is a molecule upon which an enzyme acts.Enzymes catalyze chemical reactions involving the substrate(s). In the case of a single substrate, the substrate bonds with the enzyme active site, and an enzyme-substrate complex is formed.
Describe: Enzymes bind with chemical reactants called substrates. There may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. In some reactions, a single-reactant substrate is broken down into multiple products. ... The enzyme's active site binds to the substrate.
I hope this helps :)
The enzyme in this case is lactase and the substrate is lactose.
What is the enzyme-substrate relationship?In biochemistry, the molecule on which an enzyme operates is known as the substrate. Enzymes catalyze chemical reactions involving the substrate(s). The substrate is changed by the active site into one or more released products. The active site is then ready to accept a fresh substrate molecule.
To catalyze a reaction, an enzyme will grab (bind) to one or more molecules of the reactant. These substances serve as the enzyme's substrates. In certain reactions, a single substrate can be broken down into a variety of products. Others involve the joining of two substrates to create a larger molecule or the switching of parts. In fact, every biological reaction may probably be sped up by an enzyme.
The fundamental idea should be relatively evident despite slight differences in the definitions of the substrate in general chemistry and biology. A substrate is commonly understood in chemistry as a chemical substance that may be changed by the action of another substance. Without the aid of an external catalyst or enzyme, the transformation takes place in the substrate itself, and in most cases, given enough time, it may happen on its own.
Therefore, lactase is the enzyme and lactose is the substrate.
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A powerful approach to identifying genes of a developmental pathway is to screen for mutations that suppress or enhance the phenotype of interest. This approach was undertaken to elucidate the genetic pathway controlling C. elegans vulval development. .
Part A
A lin-3 loss-of-function mutant with a vulva-less phenotype was mutagenized. Based on your knowledge of the genetic pathway, what types of mutations will suppress the vulva-less phenotype?
Check all that apply.
A. gain-of-function intracellular signal molecule (LET-60) activated by lin-3 mutants
B. loss-of-function intracellular signal molecule (LET-60) activated by lin-3 mutants
C. loss-of-function lin-3 receptor mutants
D. loss-of-function lin-3 mutants
E. gain-of-function lin-3 receptor mutants
Part B
In a complementary experiment, a gain-of-function let-23 mutant with a multi-vulva phenotype was also mutagenized. What types of mutations will suppress the multi-vulva phenotype?
Check all that apply.
A. gain-of-function intracellular signal molecule (LET-60) activated by lin-3 mutants
B. gain-of-function lin-3 receptor mutants
C. loss-of-function lin-3 receptor mutants
D. loss-of-function intracellular signal molecule (LET-60) activated by lin-3 mutants
Answer:
A. gain-of-function intracellular signal molecule (LET-60) activated by lin-3 mutants
E. gain-of-function lin-3 receptor mutants
Explanation:
Genetic suppressors are widely used in molecular genetics to study gene function in specific developmental stages and target tissues. Suppressing mutations are second mutations triggered at a different site from the mutation of interest in order to suppress the phenotypic effects caused by the first mutation. Caenorhabditis elegans is a model organism to produce genetic suppressors by taking advantage of its rapid generation time and large populations, which enables the application of rapid and powerful mutation screening procedures in the same experiment. In addition, this species reproduces by self-fertilization, thereby both dominant and recessive suppressors can be easily obtained.
Describe how a lysosome enzyme would normally be created, including the steps involved and the organelles that contribute to the process
Answer:
Lysosomal enzymes are produced in the ER and transported to the Golgi complex to be finally incorporated into acidified vesicles
Explanation:
Lysosomes organelles are generated by the fusion of vesicles from the Golgi complex with endosomes. This organelle contains more than 50 types of hydrolytic enzymes capable of breaking down different macromolecules. Lysosomal enzymes are produced in the endoplasmic reticulum (ER), and then they are exported to the Golgi complex, where mannose-6-phosphate (M6P) label is added to be finally packaged into acidified vesicles. Mutations in the genes that encode for lysosomal enzymes are known to produce Lysosomal Storage Diseases (LSD) including Tay-Sachs disease.
Which of the following cell types is correctly matched with its function?
A) mucous cells - produce intrinsic factor
B) parietal cells - produce hydrochloric acid
C) chief cells - produce mucous
D) endocrine cells - produce enzymes
E) chief cells – produce hormones
Answer:
The correct answer is B- parietal cells produce hydrochloric acid. Hydrochloric acid also referred to as gastric acid is produced as a response mechanism to histamine, acetylcholine and gastrin through the aid of H2 receptors, M3 receptors and gastrin receptors respectively. This is carried out by an active transport system into the stomach by a robust secretory system known as the canaliculi. The canaliculi are responsible for the secretion of hydrochloric acid which aids the digestion process in the stomach
Explanation:
The correct answer is B- parietal cells produce hydrochloric acid. Hydrochloric acid also referred to as gastric acid is produced as a response mechanism to histamine, acetylcholine and gastrin through the aid of H2 receptors, M3 receptors and gastrin receptors respectively. This is carried out by an active transport system into the stomach by a robust secretory system known as the canaliculi. The canaliculi are responsible for the secretion of hydrochloric acid which aids the digestion process in the stomach
Which of the following statements is NOT true of
consumers?
A. They receive their energy indirectly from the
sun.
B. They are also called heterotrophs.
C. They are able to synthesize their own food.
D. They can sometimes eat other consumers.
C)
Explanation:
They are not able to synthesise their own food
The statement that is not true about the consumers is that they are able to synthesize their own food. The correct option is C.
Who is a consumer?In biological terms, a consumer is an organism that consumes other plants and animals to get energy. They are after the producer in the food chain. They are unable to produce their own food.
Except for plants, all other organisms are consumers, they do not have chlorophyll present in their blood, to trap sunlight.
Thus, the correct option is C. They are able to synthesize their own food.
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Which of the following best describes how the
chemical energy travels up the food pyramid?
A. Chemical energy is used by each of the
organisms in the food pyramid, resulting in less
energy as it moves up the pyramid.
B. Chemical energy is made by each of the
organisms in the food pyramid, resulting in more
energy as it moves up the pyramid.
C. Chemical energy is not needed by the
organisms in the food pyramid, resulting in equal
amounts of energy throughout the food pyramid.
D. Chemical energy is used by producers but
created by consumers, resulting in fluctuations
in the amounts of energy throughout the food
pyramid
Answer:
A. Chemical energy is used by each of the organisms in the food pyramid, resulting in less energy as it moves up the pyramid.
Explanation:
Green plants are autotrophs. They manufacture their own food through photosynthesis. Through sunlight, the food manufactured has chemical energy stored in them which is made available to the heterotrophs. Heterotrophs are mainly consumers, while autotrophs are producers.
Heterotrophs rely on autotrophs for their nutrition.
Thus, as consumers above at the top of the pyramid feeds on those below, the stored energy is being transferred up and used. These energy reduces as it goes up right to the top of the pyramid.
The best statement that describes how chemical energy is transferred up the pyramid is: "A. Chemical energy is used by each of the organisms in the food pyramid, resulting in less energy as it moves up the pyramid."
Answer:
A. Chemical energy is used by each of the organisms in the food pyramid, resulting in less energy as it moves up the pyramid.
Explanation:
Genes C and D are located on opposite ends of a chromosome that is undergoing crossing-over during meiosis. Which of the following outcomes is likely to be true?
A. Recombination rates for genes C and D will likely exceed 50%.
B. Genes C and D have an increased likeilihood of being inherited as a inkage group.
C. Genes C and D have an increased likelihood of undergoing recombination.
D. Both of these answer are true: genes C and D have an increased likelihood of being inherited as a linkage group AND recombination rates for genes C and D will likely exceed 50%.
Answer:
C. Genes C and D have an increased likelihood of undergoing recombination
Explanation:
Recombination in genetics is the phenomenon responsible for genetic diversity in species of organisms. It is the process whereby the DNA (carrying genes) are rearranged in a new way on a chromosome. It is when genes are recombined during meiosis or gamete formation.
However, recombination is only possible between two different chromosomal segments or same chromosomal segments that are far apart i.e. unlinked. The farther apart two genes are on a chromosome, the greater the chance for recombination to occur. It is, however, not possible for the recombination frequency of two genes to exceed 50% i.e. 50% is the maximum.
Genes C and D are located far on opposite ends of the same chromosome, which means that there is a likelihood or chance that recombination will occur between them. They cannot exceed 50% recombination rate
Which of the following are correct regarding carbohydrates?
Answer:
Anomeric carbon comes from the corresponding aldehyde or ketone
what is the difference between Eukaryotes and prokaryotes
Answer:
Prokaryotes are unicellular organisms that lack membrane-bound structures, the most noteworthy of which is the nucleus. Prokaryotic cells tend to be small, simple cells, measuring around 0.1-5 μm in diameter.While prokaryotic cells do not have membrane-bound structures, they do have distinct cellular regions. In prokaryotic cells, DNA bundles together in a region called the nucleoid.Eukaryotes are organisms whose cells have a nucleus and other organelles enclosed by a plasma membrane. Organelles are internal structures responsible for a variety of functions, such as energy production and protein synthesis.Eukaryotic cells are large (around 10-100 μm) and complex. While most eukaryotes are multicellular organisms, there are some single-cell eukaryotes.If blood pressure doubled at the same time that the peripheral resistance doubled, the blood flow through a vessel would be
Explanation:
any increases in cardiac output (HR and/or SV), blood viscosity or total peripheral resistance will result in increases in BP.
hope this helps you
According to the flow rate fromula, if blood pressure doubled at the same time that the peripheral resistance doubled, the blood flow through a vessel would be the same, it would not change.
What is blood pressure?Blood pressure refers to the strength applied by the blood against the vessel walls as it flows.
This pressure depends on the strength and volume of the bombed blood as well as by the vessel size and flexibility.
Blood pressure changes continuously according to the activity, temperature, diet, emotional state, among others.
Whast is the peripheral resistance?Total peripheral resistance refers to the resistance offered by the vascular system to the blood flow.
This resistance is due to the friction of the blood against the vessel's walls. In other words, it is the opposition of the vessels to blood flow.
The total peripheral resistance is the summary of all the bloody circuit resistances in the body.
Mechanisms that induce vasoconstriction cause an increase in total peripheral resistance, while vasodilation provoke a decrease in total peripheral resistance.
Flow rateThe flow rate equals the pressure difference divided by resistance to flow.
Flow rate = pressure difference / resistance to flow
According to this formula, if blood pressure doubled at the same time that the peripheral resistance doubled, the blood flow through a vessel would be the same, it would not change.
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What should be the new hypothesis in the strange case of beriberi ?
Answer:
Beriberi is a disease caused by lack of vitamin B-1 called thiamine disease in the body.
Releasing factors are secreted by the a. pineal gland. b. pancreas. c. hypothalamus. d. pituitary gland.
Answer:
C) Hypothalamus
Explanation:
The hypothalamus is the part of the brain that lies below the thalamus and over the pituitary gland.
The hypothalamus is the source of various important releasing factors and hormones that stimulate the release of other hormones from the endocrine glands in the body. Examples of releasing factors include;
1) Prolactin-releasing factor which regulates the release of prolactin.
2) Somatotropin-releasing factor which regulates the release of somatotropic hormone, also known as growth hormone.
3) The corticotropin-releasing factor which regulates the release of adrenocorticotropic hormone.
Where should the label for the dependent variable be written for this scatter plot?
Answer:
B. Position B
Explanation:
The values for dependent variable are plotted on the y-axis (vertical) on a scatter plot. Therefore, the label for the dependent variable would be written along the vertical axis for the scatter plot, at position B.
The label for independent variable would be written along the horizontal axis for the scatter plot, at position C.
The answer is "B. Position B"
What are two basic differences between DNA and RNA? RNA is usually single stranded, while DNA is usually double stranded. RNA contains uracil, while DNA contains thymine. RNA is usually double stranded, while DNA is usually single stranded. RNA contains thymine, while DNA contains uracil. RNA doesn’t contain cytosine, while DNA doesn’t contain adenine.
Answer:
Explanation
the two basic difference between RNA and DNA are
RNA is single stranded while DNA is double stranded
RNA contain uracil and DNA contain thymine
Answer: I just took the test
Explanation:
Here's the picture
According to cell theory_______.
All cells have a nucleus
all cells reproduce by mitosis
all cells are differentiated
all living organisms are composed of cells
Explanation:
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[tex]<font color = purple >[/tex]According to the cell theory ,cell is the basic structural and functional unit of life all organisms are made of cells.New organisms originate from pre existing organisms.These are three fundamental postulates of cell theory.
what is the monomers that make up proteins are called ?
Answer:
Proteins are polymers; the monomers which make them up are amino acids.
Explanation:
A falling blood pH and a rising partial pressure of carbon dioxide due to pneumonia or emphysema indicates ________.
A) respiratory acidosis
B) metabolic acidosis
C) respiratory alkalosis
D) metabolic alkalosis
A. respiratory acidosis
Blood analysis indicates a low pH, and the patient is breathing rapidly.
A decrease in blood pH and an increase in carbon dioxide partial pressure due to pneumonia or emphysema signifies respiratory acidosis. The correct option is A.
What is respiratory acidosis?Respiratory acidosis arises when the lungs are unable to eliminate all of the carbon dioxide made by the body. This induces body fluids, notably blood, to become overly acidic.
A decrease in blood pH and an increase in carbon dioxide partial pressure due to pneumonia or emphysema signifies respiratory acidosis.
Thus, the correct option is A.
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In A Oil Spill why Does the Oil not mix with the Sea Water A.Lipids are hydrophobic. A.Lipids are hydrophilic. A.Lipids are saturated. A.Lipids are unsaturated.
Answer: A. lipids are hydrophobic
how are red blood cells able to move through narrow vessels to carry oxygen throughout a multicellular organism?
Answer:
The correct answer is - they lack a nucleus.
Explanation:
Red blood cells or erythrocytes are anucleated, biconcave, and small specialized cell that produce in bone marrow and lacks the mitochondria at maturity. RBC plays very important role to carry oxygen from lungs to deliver it to the various parts of the body and carry out carbon dioxide from various part to back to the lungs.
Due to lack of the cell organelles and nucleus, these cells are smaller in size. The size of RBC circulate throughout the body through narrow vessels due to its specific size and shape that provide it space for hemoglobin that binds with oxygen.
Thus, the correct answer is - they lack a nucleus.
Answer:
jgjgj
Explanation:
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Discuss our ways you can keep your nervous system healthy
Answer: BY Exercise. Or by morning waly
Explanation:beacuse due to walk our blood flow rapidly and provide more boold to brain and spinal cord. Which helps go keep our nervous system healty
A single motor neuron together with all the skeletal muscle fibers it innervates is called a:_______.
a. a dermatome.
b. an end plate.
c. an end foot.
d. a motor unit.
Answer:
d. a motor unit
Explanation:
Which describes the complex carbohydrate cellulose? It is composed of a complex arrangement of glucose molecules. It is composed of a complex arrangement of many kinds of macromolecules. It is composed of a complex arrangement of chitin molecules. It is composed of a complex arrangement of multiple disaccharides.
Answer:
It is composed of a complex arrangement of glucose molecules
Explanation:
Cellulose is a carbohydrate (glucose) polymer that comprises the cell wall of plant cells. It confers rigidity upon the cell wall of plants. Cellulose is also considered to be the most abundant compound on Earth due to the fact that vegetation is ubiquitous.
Cellulose is structurally composed of linear chains of thousands of D-glucose molecules linked together by B-1,4-glycosidic bonds. Cellulose is a complex carbohydrate made up of glucose molecules arranged in an unbranched manner.
Answer:
Here is the answer for #8 on Edge2021
Explanation:
Describe at least one
new feature you learned from this Canvas Tutorial video,
Answer:
how to canvas
Explanation:
Glucose enters erythrocytes via a GLUT-1 uniporter. As the levels of glucose in the bloodstream decrease between meals, what happens to the glucose in the cells? A. Glucose leaves the cell through the GLUT-1 uniporter, traveling down the new concentration gradient. B. Glucose remains in the cell because uniporters can only transport in one direction. C. Glucose remains in the cell because the GLUT-1 uniporters are gated and the gates close at low glucose concentrations. D. Glucose remains in the cell because it has been phosphorylated and no longer has affinity forthe GLUT-1 uniporter.
Answer:
A. Glucose leaves the cell through the GLUT-1 uniporter, traveling down the new concentration gradient.
Explanation:
The Glucose transporter 1 (GLUT1) protein is a critical uniporter transporter that facilitates the movement of glucose molecules across the plasma membrane. The expression of GLUT1 is increased when glucose concentration is reduced and, inversely, GLUT1 expression is reduced when glucose levels are increased. The erythrocytes are cells that continuously require the supply of glucose from the blood plasma, this mechanism involves the function of GLUT1 that permits the energy-free passage of glucose by diffusion.
A. If all of the conditions are present for Hardy-Weinberg equilibrium, what will be the frequencies of the alleles A1 and A2 in the next generation? B. Select one of the conditions for Hardy-Weinberg equilibrium and explain how it would impact the allele frequency from generation to generation.
Answer:
The frequencies will be the same if equilibrium is in place.
Explanation: