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storchak [24]
2 years ago
15

Please help me this is the last question to my test

Biology
1 answer:
KonstantinChe [14]2 years ago
5 0

Answer: A

Explanation:

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an air mass exist in the middle upper part of the United States what type of air mass is this and what are its main characterist
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Answer:

Air masses are characterized by their temperature and humidity properties. The properties of air masses are determined by the the underlying surface properties where they originate. ... Upon movement, air masses displace residual air over locations thus changing temperature and humidity characteristics.

Explanation:

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Which of the following is NOT an example of evolution?
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Answer:

a

Explanation:

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What unit of light stimulates photoreceptor cells in the retina?
wel

Answer:

Photons

Explanation:

The retina is a thin layer (membrane) in the eye that receives light through photoreceptor cells that convert this light into chemical and nervous signals transported to the brain's visual center.

The photoreceptors in the retina are known as rods and cones. Rods detect motion and sare responsible for black and white vision, they are present in the macula. Cones on the other and, are responsible for central and color vision. <em>These photoreceptors absorb photons that trigger the membrane's potential of the cells.</em>

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8 0
3 years ago
Which of the following is a response to an external stimulus?
yuradex [85]

Answer:

i think that the correct answer would be A

Explanation:

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6 0
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Discuss what is meant by heterozygote advantage and use sickle-cell anemia as an example
vodomira [7]
When a single copy of a disease allele doesn't result in a disease but instead is good for the person or organism that carries it, we say that allele has a heterozygote advantage. In other words this occurs when heterozyhotes have increased fitness over both homozygotes.  A good example is sickcle cell trait, which protects against malaria in heterozygotes, but causes a deadly disease in homozygotes. 
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