What is missing from the profundal zone?
A) nutrients
B) light
C) fish
D) fungus
B
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Why is it thought that the majority of natural selection is stabilizing selection?
A. Most mutations are deleterious and produce an extreme phenotype that is selected against. B. Most mutations are beneficial and produce intermediate phenotypes. C. Mutations produce extreme phenotypes, which are selected for. D. Artificial selection is the most common, which is a type of stabilizing selection. E. Directional selection is more common because it increases adaptations to the environment.
Cervical cancer
a. kills about 3,600 U.S. women each year. b. can affect young women. c. death occurs more often in women who have not had a pap smear. d. can be caused by genital HPV which has about 80% infectivity in sexually active women in the U.S. e. includes all of these.
most cells of the pancreas produce digestive enzymes, not insulin
a. true b. false
Explain how a recessive trait can be the most frequent phenotype in a population
What will be an ideal response?