The growth hormone is
a. prolactin.
b. adrenalin.
c. thyroxine.
d. ACTH.
e. somatotropin.
Answer: e
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Action potentials generated in rod and cone cells are
processed and integrated by __________ cells. a. bipolar b. ganglion c. lateral geniculate nucleus d. visual cortex e. all of these
An atom whose atomic number is 10 has how many electrons in its outermost energy level?
A) ten B) three C) five D) eight E) two
Why is mutation described as the only process that can increase genetic variation?
A. It is the only process that can produce new alleles. B. It is the only process that changes allele frequency. C. It is the only process that cannot be influenced by artificial selection. D. It is the only process that is not random. E. It is the only process that can produce deleterious results.
The phrase Darwin used to describe his broad theory of evolution is "descent with ______"
Fill in the blank(s) with the appropriate word(s).