Racial differences in skin color are due to different people having different numbers of melanocytes.

a. true
b. false


Answer: b. false

Biology & Microbiology

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Which of the following is incorrectly paired?

a. mesoderm—muscle b. endoderm—skin c. ectoderm—feathers d. mesoderm—circulatory system

Biology & Microbiology

An animal's somatic cells contain 2n chromosomes. What happens to the number of chromosomes in the animal's gametes?

A. the number is reduced to n by mitosis B. the number is reduced to n by meiosis C. the number is increased to 4n by mitosis D. the number is increased to 4n by meiosis

Biology & Microbiology

What are the typical shape, color, and nectar content of a flower that is pollinated by a hummingbird? What are the traits of a bee-pollinated flower?

What will be an ideal response?

Biology & Microbiology

Under what conditions would you expect a plant to have the highest concentration of abscisic acid (ABA)?

A) wet tropical rain forest B) cool environment after a heavy rain C) houseplant growing in low light conditions D) desert after a long drought

Biology & Microbiology