In males, gonadotropin-releasing hormone stimulates the ____ to secrete ____
a. anterior pituitary; inhibin
b. anterior pituitary; FSH and LH
c. anterior pituitary; testosterone
d. posterior pituitary; FSH and LH
e. posterior pituitary; testosterone
b
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Two populations that have been separated from each other for a long period of time with show
A. increased differences between the two populations in genetic sequences. B. decreased differences between the two populations in genetic sequences. C. no differences in genetic sequences. D. no similar genetic sequences. E. differences in the rate of mutation.
Answer the question using the accompanying figure. In the internal leaf structure, the structure labeled "2" is ____
a. a vascular bundle b. spongy mesophyll c. epidermis d. a stoma e. palisade mesophyll
A gene may consist of thousands of nucleotides.
a. true b. false
Suppose there was a mutation in the segment polarity genes of Drosophila. What do you suppose might be the outcome?
A) Several segments of the embryo will be missing. B) Every other segment of the embryo will be missing. C) Legs will appear in the place of antennae. D) Antennae will appear in a different part of their usual segment.