Answers
Answer:
B. cuticle
Explanation:
The outside surface of epidermis is covered in a waxy coat called cuticle. This cover prevents the loss of water.
Related Questions
The sequence of nucleotides in mRNA is determined by the sequence of
nucleotides in
a. amino acids
b. DNA
c. tRNA
d. ribosomes
Answers
Answer:
DNA
Explanation:
The sequence of nucleotides in mRNA is determined by the sequence of nucleotides in DNA .
The process of copying of genetic information from DNA to RNA is called transcription , and it follows the complementarity .
For eg. - If DNA sequence is ATTCGA then the RNA sequence will be UAAGCU .
( Adenosine forms base pair with Uracil instead of Thymine in RNA )
What does the Adenovirus death protein do?
Answers
Please answer ,it’s due tomorrow!
After an experiment, Monica creates a graph that chose a direct linear relationship between the size of a fish and the amount of oxygen the fish uses. Describe this trend, in terms of the amount of oxygen that a fish would use, as it grows from being very small to very large.
Answers
Based o Monica's linear graph, the growth of the fish means more demand for oxygen.
How does an increase in body size affect the demand for nutrients by living organisms?An increase in body size increases the demand for nutrients in living organisms.
This is because an increase in the size of organisms or growth results in an increase in the number of cells, and the needs of each cell also increase.
Thus, for the direct linear relationship between the size of a fish and the amount of oxygen the fish uses, the demand for oxygen for the fish will increase with the increase in the size of the fish.
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Which of the following would
NOT be considered a woody
plant?
A. shrub
B. cacti this
C. tree
D. vine
Answers
B) cacti
Explanation:
Shrubs, trees and vines are all considered “woody”.
What is it referred to when one galaxy collides with another?
O galactic cannibalism
O gravitational lensing
O globular cluster
O irregular galaxy meeting
Answers
Galactic cannibalism is referred when one galaxy collides with another.
what is galactic cannibalism?
Galactic cannibalism is the process by which a big galaxy combines with a companion through tidal gravitational interactions, creating a larger, frequently irregular galaxy.
In a new study, researchers channelled their inner Indiana Jones to demonstrate that the Milky Way, our home galaxy, once gobbled up five smaller galaxies.
That will help scientists comprehend how the Milky Way and Andromeda will engage with other, tiny, nearby galaxies and how, eventually, they will merge and join after billions of years in our portion of the cosmos.
Therefore, Option A is correct.
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What is considered the "energy
currency" of a plant cell that is
produced by light reactions?
A. ATP this
B. ADP
C. NADP+
D. 02
Answers
All biological organisms contain the crucial chemical ATP (adenosine triphosphate). Consider it the cell's "energy currency." The ATP molecule splits off one of its three phosphates when a cell has to expend energy to complete a task, resulting in the formation of ADP (Adenosine di-phosphate) + phosphate.
What are the light processes that a plant cell uses as currency for energy?In the light-dependent reactions, chlorophyll absorbs solar energy and transforms it into chemical energy that is then stored in the form of the energy-trading molecules ATP and NADPH (nicotinamide adenine dinucleotide phosphate) (adenosine triphosphate).
How are NADP+ and NADPH linked in the light reaction?NADPH is a different energy carrier used in photosynthesis, yet it performs similarly NADP+, which has lesser energy, becomes NADPH after absorbing a high-energy electron and a proton. NADPH becomes NADP+ once it surrenders its electron.
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Nondisjunction during meiosis can result in all of the following EXCEPT
Group of answer choices
cells abnormal numbers of sex chromosomes
cells with the normal number of chromosomes
cells with additional chromosomes
cells with missing chromosomes
Answers
Answer:
cells with normal number of chromosomes
Which type of blood vessel could be considered analogous to the main roads for a "delivery truck" that provides the materials the "factories" of your body need to work?
ventricle
vein
artery
aorta
Answers
Answer:
vein
Explanation:
A. Clumped distribution
B. Random distribution
C. Uniform distribution
D. No distribution
Answers
Answer: D
Explanation:
Using pictures and text, compare and contrast the digestive, circulatory and respiratory systems of an earthworm, crayfish, squid, perch and rat.
Answers
The exchange of gases usually takes place through its moist skin and capillaries called as respiratory system of earthworm
The digestive system start at the head and goes all the way down to the end of the tail and the decaying food goes in the pharynx which help to suck soil in mouth and the earthworm has a closed circulatory system and earthworm circulates blood exclusively through vessels
The squids digestive system is in form that loops and food enter the mouth and where the black chitinous beaktear the prey into the pieces and the food is then moved through the esophagus and blood then flow to the systematic heart whereas it is pimped to the rest of the body
The crayfish circulatory system is open system where blood is contained in vessel for only part of the system and the gut of the crayfish is divided into five parts
The perch digestive system start at the mouth like human and earthworm
The rat digestive system consist of an alimentary canal and the digestive gland
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How does the body respond if the skeletal system does not function properly? I would like a detailed answer please :)
Answers
If there is no skeletal system, the person will not be able to move at all or breathe.
Why is the skeletal system so important?The skeletal system not only serves as a support and lever for the movements of the body, it also serves as protection for the internal organs so that in the face of an impact it does not cause them any damage.
Also the thorax, apart from supporting all the thoracic organs and protecting them, will have a function in breathing so that they inflate while the diaphragm contracts. If all this is not done simultaneously, breathing will not be possible and this will be incompatible with life.
As for the skull, there will not be the correct separation of nerves and brain fluids and this will not be sustainable for life either, since a certain support is needed that gives the cerebrospinal fluid to the structures of the central nervous system and the intracranial pressure that also occurs.
Therefore, we can confirm that if there is no skeletal system, the person will not be able to move at all or breathe.
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The main characteristic of the first stage of photosynthesis is
A the production of hydrogen and energy
B the production of hydrogen and glucose
C the release of oxygen and carbon dioxide
D the storage of glucose in the plant's cells
Answers
Answer:
The answer to the following would be A the production of hydrogen and energy.
Have a nice day!^^
Explanation:
Preparation of the correct buffer is key to any good biological experiment and it is important that you understand how to calculate the mass of each chemical required to make that buffer and what the resulting concentration of those constituents will be in moles per litre. Your text book explains that moles are just a way to express the amount of a substance, such that one mole is equal to 6.02 x 1023 particles of that substance. These particles can be can be atoms, molecules, ions etc, so 1 mole of water is equal to 6.02 x 1023 water molecules, or 1 mole of Na+ is equal to 6.02 x 1023 Na+ ions. Since different chemicals have different molecular weights (based on the number of protons and neutrons each atom contains) 1 mole or 6.02 x 1023 atoms of oxygen (O) will have a mass of 16g whereas 1 mole or 6.02 x 1023 atoms of sodium (Na) will have a mass of 23g. If you need more information on moles, please read Encyclopedia Britannica's Moles website. Although you may sometimes see it written as g/litre, the concentration of solutions is more often described in term of molarity since it better defines the chemical properties of a solution because it is proportional to the number of molecules or ions in solution, irrespective of molecular mass of its constituents. However, it is not possible to measure moles on a laboratory balance, so in the first instance chemicals are measured by mass (milligrams, grams, kilograms etc) and the number of moles is calculated using the known molecular mass (often called molecular weight and abbreviated to M.W.) of the chemical. As indicated earlier, the molecular mass of a chemical is based on the number of protons and neutrons that is contained in each atom (eg NaCl is made up of one molecule of Na, M.W. = 22.99g and one molecule of Cl, M.W. = 35.45g, so the M.W. of NaCl is 58.44g). These values can be found in the periodic table however the molecular mass of chemicals is generally provided by any vendors of the products and so can also be found on various suppliers’ websites.
Answers
Molecular masses of the given sample are:
NaCl: 58.44 g/mole, 80 g, 1.37 M
KCl: 74.55 g/mole, 2 g, 27 mM
Na2HPO4: 142.01 g/mole, 14.2 g, 100 mM
KH2PO4: 136.09 g/mole, 2.4 g, 18 mM
What do you mean by molecular mass?The molecular mass is the mass of a given molecule: it is measured in daltons. Different molecules of the same compound may have different molecular masses because they contain different isotopes of an element.
Moreover, molecular mass or molecular weight is the mass of a molecule. “The molecular mass of a substance is the sum of the atomic masses of all the atoms in a molecule of the substance”. It is expressed in the atomic mass unit(u).
Therefore, molecular mass of an element is defined as the sum of the masses of the elements present in the molecule. Molecular mass is obtained by multiplying the atomic mass of an element with the number of atoms in the molecule and then adding the masses of all the elements in the molecule.
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Electromagnetic radiation travels in the form of
A. a hydrogen atom
B. a straight line
C. a photon this
D. a quark
Answers
According to the given statement Electromagnetic radiation travels in the form of a photon.
The correct option is C.
What is electromagnetic radiation explain?A type of energy known as electromagnetic radiation spreads as magnetic and electrical waves that move in units of energy known as photons. Electromagnetic radiation has a range with varied wavelengths and frequencies, which in turn imparts various properties.
What kind of electromagnetic radiation are there?Do you watch TV, listen to the radio or use a microwave? Electromagnetic waves are used by all of these gadgets. Electromagnetic waves, which have varying wavelengths from one another, include radio waves, microwave, visible light, and x-rays.
Is electromagnetic radiation harmful?There is no proof, despite a lot of research, that being exposed to low levels of electromagnetic fields is bad for one's health.
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QUESTION 1
Which of the following is FALSE about immunity?
A. T cells originate in the bone marrow and move into the thymus to mature
B. B cells only recognize processed antigens
C. Memory B and T cells are important in the secondary immune response and immunity
D. autoimmune diseases are when the immune system mounts an immune response to something in our own body that it should't
Answers
The statement B cells only recognize processed antigens is false about immunity. Therefore, option (B) is correct.
What are the functions of B-cells?Antigen presentation, costimulation, and cytokine production by B cells contribute to T-cell activation; affect tissue inflammation and antimicrobial defenses; and, most importantly, play the role of regulatory cells.
The two antigen-binding regions of B cell receptors are made up of four peptides, two of which are light chains and two of which are heavy chains. Heavy chains can be IgG, IgA, IgM, IgD, or IgE isotypes.
The B-cell is typically an important regulatory cell in the immune system; It acts by directly contributing to inflammatory pathways, supporting other mononuclear cells, producing antibodies, and antigen-presenting cells.
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In ASEXUAL reproduction, what is the main means for genetic variation in organisms?
O meiosis
O crossing over
O fertilization
O mutations
Answers
Answer:
mutations
Explanation:
asexual means no sex involved. that can only mean that mutations can make the cells dofferent
What is the name of the
root-like structure that
bryophytes use to absorb
water and nutrients?
A. branches
B. root hairs
C. tubers
D. rhizoids this
Answers
Answer:
D. rhizoids
Explanation:
How did the accurrences of the different traits change over the 30-year period? Use euidence from the graph to support your answer. Using what you know about natural selection and adaptation, what generalization can you make based on these changes?
Answers
When changes occur to face environmental pressures, they must increase the individual's fitness to be favored by natural selection and result in adaptation. Between 1950 and 1980, individuals with half their bodies covered by plates decreased, while individuals with their whole bodies covered by plates increased.
How are adaptation and natural selection related?
Adaptations can be understood as the way in which different organisms manage to improve their fitness in the environment in which they live. To do it, they must adjust to the changes and selective pressures acting on them.
Adaptations involve changes and are usually related to mutations (let us remember that mutations are changes in DNA nucleotide sequences).
These changes must be beneficial for the individuals, meaning they must increase their fitness and make them more competitive.
If they do not increase their fitness (aptitude) they get lost.
If they increase the individual's fitness, they are selected by natural selection and transmitted through generations.
When natural selection favors a mutation, it sets it in the population and is inherited by the following generations. These mutations improve the individual's survival and reproductive rates. Hence, natural selection results in adaptation.
Image explanation
In the exposed example, we can see how the percentage of plates covering the animal's body changed through time.
At the beginning of the study (the year 1950), most animals had half of their bodies covered by plates (green bar), and only a few individuals had 2/3 bodies protected (orange bar).
As the lake changed its clarity, stickleback fishes with only half of their bodies protected got probably more exposed and easily seen by their predators. Their survival and reproductive rates decreased. From 1950 to the end of the study, their population size decreased significantly.
Predation acted as the environmental pressure. So the fish species needed to face this problem.
By 1960, a few individuals developed a new strategy. Their whole bodies were protected by plates (blue bar). This phenotype meant an increase in their survival and reproductive rates, so this strategy spread more in the population. Natural selection favored this change and set it.
By 1980 most individuals had their whole bodies protected by plates, and only a few of them still had half of their bodies covered. Since this turned out to be a beneficial change, population size started to recover.
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Which process would change metamorphic rock to igneous rock?
O melting followed by cooling
O pressure followed by weathering
O erosion followed by compaction
O cooling followed by cementation
Answers
Answer:
The correct answer is Option A.
Explanation:
A metamorphic rock becomes an igneous rock through the process of solidification. In this process, the atoms in the rock rearrange themselves until they form a solid structure. The atoms in a liquid or gas are in constant motion, but when they are solidified, they form a fixed, crystalline structure.
Answer:
A is the right answer
Explanation:
I got it right
What advantages does a coelom provide the earthworm and the salamander?
Answers
Explanation:
The coelom refers to the body cavity derived from mesoderm germ layer and mainly found in multicellular animals and is positioned inside the body to surround and contain the digestive tract and other organs.
There are many advantages that coelom provides to the earthworm and the salamander. The digestive system of earthworms and salamanders is more complex, here coelomic fluid helps their body processes and assists as a hydrostatic skeleton.
The coelom's main advantage is its flexibility. The internal organs for example the heart, liver, lungs, and intestines develop, and they help to push into the coelom. The fluid of the coelom diminishes the organs for protecting the organs and also enables them to turn, bend, shift and move. In this way, coelom helps the animals internally to finish and run the system inside in the correct way. Coelom helps the earthworms and salamanders in building the correct system and protecting their organs to maintain and enable them to function properly.
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Help me lolll pls pls pls pls pls pls pls pls pls
Answers
Answer:
Plants are amazing organisms! In a process called photosynthesis, they take sunlight energy from the sun,carbon dioxide gas from the air, and water from the ground and make glucose (food energy)! They also make oxygen during this process. Plants can either immediately use the glucose they make to power their cells or sto… use.
Explanation:
I couldn't read some of the text due to the picture, but this should be right. I hope this helps! :)
What causes the body to do
lactic acid fermentation instead
of cellular respiration?
A. an overproduction of oxygen
B. an overproduction of carbon dioxide
C. an insufficient amount of carbon dioxide
D. an insufficient amount of oxygen this
Answers
An insufficient amount of oxygen causes the body to do lactic acid fermentation instead of cellular respiration
What is lactic acid fermentation and cellular respiration ?Cellular respiration is the process by which organisms combine oxygen with food molecules, rerouting the chemical energy in these molecules into life-sustaining processes while discarding carbon dioxide and water as waste products.
Anaerobic respiration (or fermentation) of the kind that produces lactic acid uses the breakdown of carbohydrates to create ATP as a source of energy. Because it takes place without oxygen, it is called anaerobic.When there is a lack of oxygen in the cell, skeletal muscle cells use lactic acid fermentation to renew these NAD+ molecules. Because they lack the mitochondria necessary to engage in aerobic cellular respiration, red blood cells must always regenerate NAD+ via lactic acid fermentation.Learn more about Cellular respiration here:
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Which is not a way that ectothermic animals maintain their bodies at a consistent, appropriate temperature?
A. By generating large amounts of metabolic heat
B. By constricting or dilating blood vessels near the surface of the skin
C. Through behavioral adaptations such as basking in the sun or cooling in the shade
D. Bypassing cool venous blood near warm arteries running in the opposite direction
Answers
The method by which ectothermic animals do not regulate their body temperature is: (A) by generating large amount of metabolic heat.
Ectothermic animals such as snakes as well as lizards do not utilize metabolic heat in order to maintain their body temperature. Ectothermic animals are primarily dependent on the external sources of heat. The body temperature of such animals changes according to the external temperature.
On the other hand, endothermic animals tend to maintain a uniform body temperature through the process of metabolic heat production, e.g. birds as well as mammals. The internal body temperature of endothermic animals is almost independent of the temperature of their surrounding habitat.
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17. According to Sigmund Freud, memories that easily surface into
everyday thought are in which part of the mind?
Hint: In the iceberg analogy, this is the part of the iceberg that's just
below the surface of the water.
Answers
Sigmund Freud, memories easily surface into everyday thoughts that are considered conscious parts of the mind.
How conscious mind work?The conscious mind holds all of our ideas, memories, feelings, and desires at any one time.
This includes our memories, which although sometimes unconscious, are easily retrievable and brought back to consciousness.
Therefore according to Sigmund Freud, memories that easily enter into everyday awareness are a conscious aspect of the mind.
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What is the active site?
A. the site on an enzyme that a substrate
binds to this
B. the site on an enzyme that breaks off
C. the least important site on an enzyme
D. the site on an enzyme responsible for cell
temperature control
Answers
An active site is a site on an enzyme that a substrate binds to this. So the correct option is A.
The active site refers to the specific region of an enzyme where a substrate binds and catalysis takes place.
It is a structural element of protein that determines whether the protein is functional when undergoing a reaction from an enzyme. This structural element will be accordingly shaped to the structure of the enzyme.
A tighter fit between an active site and the substrate molecule is believed to increase the efficiency of a reaction. If the tightness between the active site of DNA polymerase and its substrate is increased, the rate of DNA replication will also increase. Most enzymes have deeply buried active sites, which can be accessed by a substrate via access channels. The active site is made up of residues that can form bonds with the substrate, particularly at the binding site.
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Answer:
a) the site on an enzyme that a substrate
binds to this
Explanation:
The active site is the site on an enzyme that a substrate binds. Hence, the option (a) is the correct answer.
A bacterial cell makes binary fission many times and 16 calls are produced during two hours.What is the time taken by one binary fission?
a)30 minutes
b)60 minutes
c)45 minutes
d)20 minutes
Answers
Answer: 20 minutes
Explanation: Binary fission is a very quick way to reproduce. Some bacteria are able to divide themselves up every 20 minutes. A billion bacteria can be produced in this way from one bacterium in just ten hours given the right conditions.
genotypes and phenotypes
Answers
Answer:
A person's genotype is their unique sequence of DNA. More specifically, this term is used to refer to the two alleles a person has inherited for a particular gene. Phenotype is the detectable expression of this genotype – a patient's clinical presentation.
Explanation:
Chlorophyll in the
chloroplast reflects which
color on the spectrum of
visible light?
A. red
C. violet
B. blue
D. green
Its green
Answers
Chlorophyll in the chloroplast reflects green color on the spectrum of
visible light.
What is chlorophyll?
The ability to produce their own nourishment exists in green plants. They achieve this through a process known as photosynthesis, which makes use of the green pigment chlorophyll. A molecule with a specific color known as a pigment can absorb light at various wavelengths depending on the color. Although there are many various kinds of pigments in nature, chlorophyll is special in that it allows plants to absorb the energy they require to develop tissues.The little structures called chloroplasts found in a plant's cells are where chlorophyll is found. This is the location of photosynthesis.Each pigment has a distinctive absorption spectrum that illustrates how it absorbs or reflects various light wavelengths. Chlorophyll and other pigments used in photosynthesis absorb wavelengths, creating electrons that power photosynthesis. All visible light wavelengths, with the exception of green, are absorbed by chlorophyll, the green pigment found in all photosynthetic cells. Because of this, plants seem green to us.
Hence, Chlorophyll in the chloroplast reflects green color on the spectrum of visible light.
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How do humans
contribute to the level of
carbon dioxide in the
atmosphere?
A. the growing of bone structures
B. the burning of fossil fuels this
C. during photosynthesis
Answers
Answer: B
Explanation: Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere.
Are the resulting cells at the end of Mitosis diploid or haploid
Answers
diploid
Explanation:The four daughter cells resulting from meiosis are haploid and genetically distinct. The daughter cells resulting from mitosis are diploid and identical to the parent cell.
