Human skin colour is due to a pigment called melanin. The melanin pigment is present in outer layer of skin cells. UV light causes increase in production of melanin resulting in darker skin shade.
Why the human skin colour varies?UV radiation can cause photolysis of folate. This can lower the level of folate. If the level of melanin increase, it will stop the breakdown of folate. This will result in variation of colour in high intensive UV areas.
Thus, it can be concluded that increased UV radiation can cause variation in human skin colour.
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A little girl has a male dog and a female cat in her house at the same time. The dog and cat are the same size, and they are friendly with each other. Why don't these two animals ever mate
Answer:
Well for one, a dogs sperm couldn't fertilize a cats egg and vice versa. Their breeding behaviors, heat cycles, and different DNA prevent them from being able to produce healthy, viable offspring.
Explanation:
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Answer:
B.
Explanation:
Raising water level makes it easier to flood
A cross section of a flower is shown below:
What are the parts and primary function of the male reproductive organ?
Question 1 options:
the stigma and ovary, the ovary produces ova
the stigma and style, the stigma produces pollen
the anther and filament, the anther produces pollen
the anther and filament, the filament produces ova
The anther and filament, the anther produces pollen. They are the parts of the male reproductive organ in a flower.
What are the male parts of the flowers?The flower can be considered as the reproductive structure of flowering plants.
The anther and filaments represent the male structures of a flower, which may also contain female structures.
The stamen can be considered as the male reproductive organ because this structure is responsible for producing pollen which contains germinal cells in a flower.
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why would dna evidence also be a type of homologous trait
Answer:
Homology is the relationship between structures or DNA derived from the most recent common ancestor. Although these two structures do not look similar or have the same function, genetically, they come from the same structure of the last common ancestor.
Explanation:
Look at the way honeycreepers evolved. If a new species of honeycreeper were discovered, and it had a short, straight beak, which bird in this puzzle would likely be its closest living relative?.
The bird in this puzzle which would likely be its closest living relative is the Po'ouli.
What is Poʻooull?
This is regarded as the black-faced honeycreeper which is also an extinct species as a result of habitat damage in Hawaii.
This bird is a species of the honeycreeper with a characteristic black face, short, straight beak which is why it was chosen as the most appropriate choice.
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The absorptive sutface or the small intestime is increased by _____times because of the rugae, villi and microvilli.
Answer:
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True or false: The somatosensory association area can tell the difference between the feel of a marble and a coin because those texture and shape differences have been previously stored.
Once animals use oxygen, it can never be replaced?
Answer:
Once animals use oxygen, it can never be replaced. ... Plants produce oxygen as a waste product of photosynthesis.
Explanation:
No, once animals use oxygen it never is replaced.
What is aerobic respiration?Aerobic respiration: This is the process of cellular respiration that occurs in the presence of oxygen gas to extract energy from food. This type of breathing is common to most plants and animals, birds, humans, and other mammals. The end products are water and carbon dioxide.
Aerobic respiration is the process of using oxygen to break down glucose, amino acids, and fatty acids to produce ATP.
Pyruvate is then converted to acetyl-CoA in the mitochondrial matrix. The Krebs cycle occurs twice per glucose molecule. ATP synthase generates ATP from ADP and inorganic phosphate. The electron transport chain is the main channel for the production of ATP in all organisms.
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The result of the following cross indicates the orange eyes are _____ black eyes. A cross between two aliens with black eyes. Their offspring have two phenotypes. 247 of them have black eyes, 86 of them are orange-eyed. The total number of the offspring is 333.
A. recessive to
B. larger than
C. dominant to
D. co-dominant to
E. incompletely dominant to
Answer:
A
Explanation:
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Answer:
Carbon dioxide is composed of one carbon atom covalently bonded to two oxygen atoms. It is a gas (at standard temperature and pressure) that is exhaled by animals and utilized by plants during photosynthesis. Carbon dioxide, CO2, is a chemical compound composed of two oxygen atoms and one carbon atom.
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ILL Give brainliest, Why is diabetes a serious disease?
Because you have to go to lots of doctor’s appointments
Because every cell in your body needs glucose to live
Because you have to give yourself insulin shots
Because you can’t eat what you want anymore
Answer:
When there isn't enough insulin or cells stop responding to insulin, too much blood sugar stays in your bloodstream. Over time, that can cause serious health problems, such as heart disease, vision loss, and kidney disease.
Diabetes is a serious disease because you have to give yourself insulin shots.
What is insulin?The INS gene in humans encodes insulin, a peptide hormone generated mostly via beta cells within the pancreas.
What is Diabetes?When the blood glucose, commonly known as blood sugar, would be too high, then develop diabetes.
Diabetes develops when the pancreatic, a gland located behind the stomach, either produces insufficient amounts of the hormone insulin or even when the body has trouble utilizing it. Insulin aids in the movement of circulation sugar towards cells. Sugar becomes transformed into energy once within the cells, either for now or for later.
Therefore, the correct answer will be an option (C).
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A dam is removed upriver from a wetland causing the river to bring much more freshwater to the wetland
Explain what sustainable Forest Management is
Answer:
Basically helping, and taking care of the forest. Without destroying anything a future gen. might feel is the same
Explanation:
The practice of meeting the forest resource needs and values of the present without compromising the similar capability of future generations
Describe how glucose gets to a cell in a muscle using digestion and human circulatory system
What effects are produced by an enzyme on the general reaction?.
Answer:
Enzymes are the protein molecules that act as a catalyst in a reaction. It makes the reaction faster by increasing its rate of reaction by *lowering the activation energy of the reaction*. It acts on the substrate molecules by binding them at the active site and convert them into products.
Explanation:
Summarize your first NASA spinoff technology in the answer space. Use the Insert Image button to add an image file.
One of the first interesting NASA Spinoff Technology is the Drill Bits that are able to break off and retain rock samples. They are then collected on Perseverance and flown to earth for the use of geologists.
What is NASA Spinoff Technology?This is a publication from the National Aeronautics and Space Administration that shows the technology used by NASA to the public.
NASA has shown about fifty technologies each year since 1976 in this annual publication.
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why is there a good prospect for fruit nursery farming in Nepal
Answer:
➢ A place where young plants are produced through different ways is called a nursery. The main work of nursery is to supply young plants and seeds for cultivation purpose for both fruits and vegetables. A nursery might be big or small depending on the types of plants one wish to grow.
Explanation:
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Which individuals help you determine if this trait is dominant or recessive?
5. A sea otter's muscle cells produce heat that keeps the otter warm. Explain how at least two structures inside a cell work
together as part of this process.
The two structures in Sea otters which work together as part of this
process include the following:
MitochondrionAdipose tissueWhat is Mitochondria?This is regarded as the power house of the cell in which ATP is generated
for distribution to other parts of the cells.
Sea otters have adipose tissues which are thick as a result of the presence
of fat. The mitochondrion in this animal is leaky and energy is easily
released in the form of heat even when the animal isn't performing any
activity.
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Explain why frameshift mutations have a greater effect than do point mutations.
to which organ does the blood flow to after it leaves the heart and what happens when it reaches that organ
Answer:
Blood leaves the heart through the pulmonic valve, into the pulmonary artery, and to the lungs. Blood leaves the heart through the aortic valve, into the aorta, and to the body. This pattern is repeated, causing blood to flow continuously to the heart, lungs, and body.
Explanation:
Answer:
*
Explanation:
- When the blood leaves the heart it flows to the lungs
- In the lungs, the blood refills its oxygen supply and gets rid of carbon dioxide. The oxygenated blood returns from the lungs to the left atrium through the pulmonary veins to the heart
- The blood travels to your lungs so that you can breathe out the carbon dioxide and breathe in more oxygen.
Why does water expand
Answer:
this happens when it freezes
Explanation:
When water freezes, its molecules get arranged in a crystalline structure, thereby attaining a defined shape. This crystalline structure is less dense, and since there are gaps between individual molecules in the structure, the overall volume increases and water expands
Answer:
Water expands as it freezes because water molecules are very loosely bound. They are arranged in a hexagonal pattern inside of the ice. As the temperature lowers, the molecules move slower, which causes them to get closer together.
Explanation:
If a molecule of DNA is 22% guanine, what is the approximate percentage of thymine?
Answer: It would be approximately 22% thymine.
DNA codes for 20 different amino acids. How these amino acids combine determines the shape and function of the proteins they form. Which process decodes genetic information to arrange amino acids?
Transfer
Translation
Regulation
Transcription
Question :-
Define reservoir?
Which term is defined as food components such as fibers that are not digested by the human body but are used as food by the GI bacteria to promote their growth and activity?
a. postbiotics
b. probiotics
c. abiotics
d. prebiotics
e. symbiotics
The term defined as food components such as fibers that are not digested by the human body but are used as food by the GI bacteria to promote their growth and activity is prebiotics.
WHAT ARE PREBIOTICS?Prebiotics are food components like carbohydrates and fibres that feed the beneficial bacteria in human gut.
Humans don’t normally digest prebiotics directly, however, the microbes in our gut can use them for their growth and development.
Therefore, the term defined as food components such as fibers that are not digested by the human body but are used as food by the GI bacteria to promote their growth and activity is prebiotics.
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the human circulatory system is composed of a network of arteries, veins, and lymphatic vessels that carry blood and lymph throughout the body. an essential task by which the circulatory system helps the body maintain homeostasis is
Answer:
What is the vascular system? The vascular system, also called the circulatory system, is made up of the vessels that carry blood and lymph through the body The arteries and veins carry blood throughout the body, delivering oxygen and nutrients to the body tissues and taking away tissue waste matter
I need help filling this pdf please. I've looked up tutorials because the link my teacher gave was wrong but also the pdf I got was a newer version.
Explanation:
maybe this might be of some help?
Plants that love in the desert need to store lots of water for times of drought. In what part of the cell is the water stored?
A. Nucleus
B. Ribosomes
C. Cytoplasm
D. Vacuole
In a person with a disease in which the mitochondria do not produce enough energy for the cell, which organs would be the most severely affected
The heart would be one of the most affected organs if the mitochondria do not produce enough energy, since this organ requires a lot of energy, so any supply failure leads to heart failure and contraction failure.
What are mitochondria?They are the cellular structures responsible for supplying most of the energy necessary for cellular activity.
Characteristics of mitochondriaThey produce energy from the metabolism of organic fuels such as sugars, lipids (fatty acids) and amino acids.Insufficient energy production by the mitochondria causes dilated cardiomyopathy, where the heart undergoes significant dilation and loses the force of contraction.Therefore, we can conclude that a defect in a mitochondrial process involved in energy production would affect heart cells causing dilated cardiomyopathy, heart failure.
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