As you are walking along a beach, you find an animal and believe that it belongs to the class Asteroidea. Which of the following characteristics would support your hypothesis that the animal is a sea star and not another type of echinoderm?

A) It is pentaradially symmetric.
B) It feeds on other animals.
C) It has a hydrostatic skeleton, formed from its water vascular system.
D) Its central region is not well-delineated from its appendages.


D

Biology & Microbiology

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In the figure, the pattern of divergent evolution is best illustrated by



A. A.
B. B.
C. C.
D. None is a good illustration of divergent evolution.

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What nitrogenous bases is found in DNA but not in RNA?

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A change in a population that is NOT related strictly to the size of the population is best described as

a. density-dependent. b. density-independent. c. within. d. an S-shaped curve. e. a J-shaped curve.

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In order to understand the carbon cycle, it is important to recognize where carbon can be found on earth. Carbon can be found in

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Biology & Microbiology