Biology, 19.11.2019 05:31 treaustin6978
Human populations in low-uv environments tend to have more lightly pigmented skin. one explanation is that the selective pressure for dark skin decreases as uv intensity decreases. at the same time there is selection for lighter skin to absorb more uv radiation, which is needed for vitamin d production. what evidence supports the vitamin d hypothesis for the evolution of lighter skin tones? a. lightly pigmented people tend to be at higher risk of vitamin d deficiency b. red hair and light skin are typical of people of northern european descent c. lightly pigmented people cannot synthesize vitamin d in high-uv environments, such as equatorial africa d. indigenous peoples living at high latitudes have darker skin, but they eat foods rich in vitamin d
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Biology, 21.06.2019 22:20
Which of the following is a way that minerals are used? a. industry construction technology d. all of the above
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Biology, 21.06.2019 23:00
Use this new information to determine the parentsβ genotypes (indicated by red arrows). then calculate the probabilities that the second male offspring will have each condition. drag one pink label to each pink target and one blue label to each blue target. then use the white labels to answer questions 1 and 2. labels can be used once, more than once, or not at all.
Answers: 3
Biology, 22.06.2019 02:30
Plz ! a frog has a genetic mutation in skin cells that causes part of its skin to turn orange the frog will not pass this genetic mutation onto its offspring because, a. the offspring will inherit skin cells from the other parent. b. mutated skin cells cannot divide and produce daughter skin cells. c. skin cells do not contribute genetic material to sex cells. d. parents do not contribute genetic material to their offspring.
Answers: 2
Biology, 22.06.2019 02:30
Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?
Answers: 1
Human populations in low-uv environments tend to have more lightly pigmented skin. one explanation i...
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