External fertilization is most common in animals living in ____

a. mountains
b. prairies
c. forests
d. oceans
e. deserts


ANSWER: d

Biology & Microbiology

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By definition, a nerve is

a. a bundle of sensory, motor, or both types of nerve fibers outside the central nervous system. b. a single extension of a neuron. c. the same as a neuron but within the central nervous system. d. a collection of nerve cell bodies outside the central nervous system. e. a fiber more than ten inches in length.

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Which of the following is an enzyme?

a. fibrinogen b. fibrin c. plateletase d. thrombin e. plasminogen

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Four of the five features listed below are

characteristics of the tropical rain forest. Select the exception. a. extensive erosion b. great biotic diversity c. high rate of decomposition d. lack of soil nutrients e. large herds of herbivores

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Peptide hormones such as insulin cannot pass through the plasma membrane so they bind to receptors on the target cell's surface, triggering the production of second messengers

Indicate whether the statement is true or false

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