Progression through the phases of the cell cycle is regulated by fluctuating concentrations of ____
a. microtubules
b. actin
c. cyclins
d. cyclin-dependent kinases
e. histones
ANSWER: c
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Synaptic vesicles are synthesized in the nerve ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is a dermatophytic infection of any part of the skin?
A. Tinea corporis B. Tinea barbae C. Tinea capitis D. All of the choices are correct.
Arrange the following layers from most external to most internal
1 = Cell membrane 2 = Capsule 3 = Cell wall
a. 1, 2, 3 b. 2, 1, 3 c. 2, 3, 1 d. 3, 1, 2 e. 3, 2, 1
In the case of the peppered moths in England, when Kettlewell set up cameras to document that more white or black moths were eaten by birds on clean or sooty trees, he was verifying which factor involved in evolution by natural selection?
A. Some individuals are better adapted to a particular environment than other individuals. B. The organisms vary in traits and that these traits may be acquired during a lifetime. C. The variation is inherited. D. More young are born than can survive, so there will always be competition.