What occurs when a cell differentiates?
a. It becomes specialized to perform a particular function
b. It stops using nutrients and dies.
c. It morphs into a faster dividing cell.
d. It divides into other cells that contain a lesser number of chromosomes.
e. It becomes physically larger and more complex.
a
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A child falls and breaks his humerus, the upper arm bone, along the epiphyseal plate. Which of the following could result from this injury?
A. As an adult this person will have one humerus longer than the other. B. Blood cell production will decrease dramatically in the injured bone. C. As an adult, red marrow will persist in the medullary cavity of the humerus. D. As an adult, the diaphysis of the broken humerus will be much smaller than that of the unbroken one.
A stroke is a
a. cerebrovascular accident. b. glucose deficiency. c. loss of the myelin sheath. d. neurotransmitter deficiency. e. uncontrolled firing of neurons.
A secondary spermatocyte
a. is haploid with unduplicated chromosomes. b. is haploid with duplicated chromosomes. c. is diploid with unduplicated chromosomes. d. is diploid with duplicated chromosomes. e. none of these answers.
The process of male gamete, or sperm cell, development is known as:
A) spermatogenesis. B) fertilization. C) mitosis. D) oogenesis.