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
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You’ve just finished a big meal and are
relaxing in front of a fire reading your favorite book. The ___ division of your ___ nervous system is at work.
a. parasympathetic--autonomic b. parasympathetic--somatic c. sympathetic--autonomic d. sympathetic--somatic e. autonomic--somatic
An arthropod embryo has ________ germ layer(s)
A) no B) one C) two D) three E) four
Homo erectus has been shown to have dispersed from
A. South America. B. Asia. C. North America. D. Africa. E. Europe.
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.