If a sheep and goat are mated, their offspring dies as an embryo. This is an example of _______ reproductive isolation.
A. prezygotic
B. allopatric
C. sympatric
D. postzygotic
E. outgroup
D. postzygotic
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Research by Christopher Cullis has shown that ____
a. the genome size of plants varies little between species b. the genome size of individual plants of the same species is constant c. a plant’s environment can act as a selective agent to establish advantageous variants, but these variants cannot be transmitted to the next generation d. a plant’s environment can act as a selective agent to establish advantageous variants, and these variants can be transmitted to the next generation e. the genome size of plants is related to plant size
Which of the following processes is the transfer of heat from a body to a fluid that passes over its
surface?
a. conduction b. radiation c. evaporation d. convection e. radiative cooling
The element needed for blood clotting, nerve
transmission, and bone formation is a. iron. b. iodine. c. calcium. d. zinc. e. magnesium.
Which of the following is represented by the membrane indicated in the figure?
a. outer mitochondrial membrane
b. plasma membrane
c. nuclear membrane
d. inner mitochondrial membrane