Which aquatic ecosystem is known as the

marine nursery?



a. coral reef
b. hydrothermal vents
c. coral reefs
d. estuary
e. seamounts


D

Biology & Microbiology

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In the absence of predation, is there any limit on prey population size?

a. yes b. no

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Movable bones are features of the sense organs

associated with a. sight. b. hearing. c. taste. d. smell. e. touch.

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Movement of body parts directly requires the

a. endocrine system and nervous system. b. muscular system and skeletal system. c. skeletal system and digestive system. d. muscular system and cardiovascular system. e. nervous system and endocrine system.

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Which of the following is a trace mineral?

A) iodine B) sodium C) phosphorus D) sulfur

Biology & Microbiology