Which of the following choices is not a function of mitosis?
a. healing wounds
b. increases in body size during growth
c. replacement of old or dead cells
d. formation of gametes
d
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You are at the aquarium looking at a freshwater mammal tank and a manatee swims close to the glass. On his front flippers you see fingernails. You think, what possible use could fingernails be to a manatee, then you realize they are of no use at all. Which of the following best explains the presence of fingernails on a manatee?
A. they are remnants of the bones used by fish for their fins. B. they are homologous structures. C. the bones are protruding from the fins and only look like fingernails, even though every manatee in the tank looks like it has fingernails. D. convergent evolution has occurred. E. they are vestigial structures.
In this illustration, some of the organisms are vertebrates while others are both vertebrates and amniotes. Which of the following pairs are in both clades?
a. lancelets and lampreys
b. lampreys and humans
c. rabbits and lizards
d. lancelets and rabbits
The basic unit of the nervous system is the
a. neuron. b. neuroglial cell. c. brain. d. nerve. e. neurotransmitter.
Which of the following is part of the brain?
A) thymus B) hypothalamus C) adrenal cortex D) thyroid