In hybrid zones where reinforcement is occurring, we should see a decline in _____
A) gene flow between distinct gene pools
B) speciation
C) the genetic distinctness of two gene pools
D) mutation rates
A
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A change in chromosome number during
fertilization can lead to
a. sympatric speciation. b. disruptive selection. c. directional selection. d. hybrid sterility. e. allopatric speciation
Mendel’s experiments on pea plants showed that genes are passed ____________________ from generation to
generation and that traits are not ____________________. Fill in the blank(s) with the appropriate word(s).
If a person were unable to produce much of this substance, the gastric juices might destroy the stomach lining
A) chyme B) HCl C) mucus D) pepsin
Legumes, such as beans or peas
A) form mutualistic associations with nitrogen-fixing bacteria. B) form mycorrhizal associations to increase nitrogen fixation in the soil. C) form parasitic relationships with other photosynthetic plants. D) fix N2 from the atmosphere in their leaves.