The habitats most favorable for the growth of legumes in symbiosis with nitrogen-fixing bacteria are
A. calcium-poor soils.
B. nitrogen-poor soils.
C. phosphorus-poor soils.
D. manganese-poor soils.
E. potassium-poor soils.
Answer: B
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Which of the following describes populations that are genetically isolated?
A. They do not share the same mutations. B. They do not live in the same areas. C. They do not exchange genetic information. D. They do not originate from the same population. E. They do not evolve.
Sunlight resets biological clocks in plants by activating and inactivating photoreceptors called ________
a. statoliths b. jasmonates c. phytochromes d. phototropin
The vertebral column develops from
a. the notochord. b. the hollow, dorsal nerve cord. c. the gill slits. d. the tail. e. more than one of these
Fundamental similarity due to descent from a common ancestor is called
A. homology. B. commonality. C. analogy. D. convergence. E. Both analogy and convergence are correct.