Where does competition for reproduction most likely occur?

ecosystem

community

organism

population

Structures as different as human arms, bat wings, and dolphin flippers contain many of the same bones, these bones having developed from the same embryonic tissues. How do biologists interpret these similarities?

Hemophilia is a recessive sex-linked trait. Cross a woman who is homozygous dominant that does not have hemophilia and a man with hemophilia.

Which of the following mutations would cause the most dramatic change in the polypeptide product of a certain gene?

Describe how the red crab spider is adapted for its unique method of hunting.

Which statement is true? A. Lipids are a type of fat. B. Fats are a type of lipid. C. Fats and lipids are separate and unrelated substances. D. All lipids are fats, and all fats are lipids.

Suppose that two ancient types of plants, one that grows in the winter and one that grows in the summer, appear together in the fossil record for two periods in the geologic time scale.

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How are traits inherited by offspring?

In homeotic mutants: Group of answer choices one body structure is missing. one body structure has been changed into another. one body structure has been duplicated. one body structure has significantly increased in size. the organism is infertile.

What effect of acid rain on a ecosystem is