Expression of a shortened skin keratin gene in place of the normal keratin gene in transgenic mice resulted in a phenotype in which mice had

a. thick skin.
b. no hair.
c. fragile, easily blistered skin.
d. white hair.
e. Both b and c


Answer: e. Both b and c

Biology & Microbiology

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a. parasympathetic--autonomic b. parasympathetic--somatic c. sympathetic--autonomic d. sympathetic--somatic e. autonomic--somatic

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An arthropod embryo has ________ germ layer(s)

A) no B) one C) two D) three E) four

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Homo erectus has been shown to have dispersed from

A. South America. B. Asia. C. North America. D. Africa. E. Europe.

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Collecting data without a specific hypothesis in mind is called

A. hypothesis testing. B. reductionism. C. discovery-based science. D. theoretical. E. All of the choices are correct.

Biology & Microbiology