Which of the following types of reproductive barriers separates a pair of insect species that could interbreed but for the fact that one lives on goldenrod plants and the other on autumn daisies in the same general area?
A) temporal isolation
B) habitat isolation
C) behavioral isolation
D) gametic isolation
Answer: B
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In just over a decade of efforts, the World Health Organization (WHO) eradicated smallpox by using worldwide
A) education campaigns. B) destruction of infected domestic animals. C) education campaigns and destruction of infected domestic animals. D) vaccination programs.
The center of a primary eudicot root is known as the:a
phloem. b. symplast. c. cortex. d. pericycle. e. stele.
Hensen's node is located:a
in the walls of the archenteron. b. at the end of the primitive streak. c. on the outer side of the chorion. d. inside a blastomere. e. inside the neural groove
Many plants are mycorrhizal: Their roots are infected with a specialized fungus. The plant supplies carbon to the fungus, and the fungus supplies nutrients to the plant
The relationship between these plants and the mycorrhizal fungi is an example of a ________ association. A) competitive B) mutualistic C) successional D) predator-prey E) parasitic