An embryo was exposed to a chemical early in its development. At birth, there is chromosomal damage to the skin linked to the chemical exposure. What other organ system should be examined for the same type of damage?
What will be an ideal response?
The nervous system, since the ectoderm develops into both the skin and the nervous system.
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The phenomenon of "glucose sparing" depends most critically on
A. glycogenolysis. B. protein synthesis. C. lipolysis. D. lipogenesis. E. glucose polymer formation.
The convergence in external morphology of
sharks, penguins, and porpoises is attributed to a. reduced genetic variability in these groups. b. selection pressures that are common to these groups. c. reproductive isolation of these groups. d. identical genes in all three groups. e. use and disuse of the limbs
An individual muscle cell is called a _____
1.fascicle
2.muscle fiber
3.myofibril
4.sarcomere
The primitive earth's atmosphere did NOT contain
a. water vapor. b. free nitrogen. c. free hydrogen. d. free oxygen. e. inert gases.