Differential gene expression can result from two different genes sharing what in common?
a. enhancer
b. distal control elements
c. promoter
d. activators
c. promoter
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Structures that are shed in one piece include
a. the cuticle of roundworms. b. the exoskeleton of arthropods. c. human hair. d. all of the above.
The correlation coefficient for totally unrelated people is ____________________. Fill in the blank(s) with the appropriate word(s)
In the history of life development on Earth one must
A. trace events that compose macroevolution. B. examine the fossil record. C. examine biogeographical evidence. D. all of the choices must be considered.
All of the following are advantages of attenuated vaccines over inactivated vaccines exceptÂ
A. they produce infection but not disease. B. they can mutate back to a virulent strain. C. they require smaller doses. D. they confer longer lasting protection. E. they require fewer boosters.