Species that are especially intolerant of physical disturbance to their environment are referred to as ____.

A. ecosystem engineers
B. indicator species
C. exotic species
D. native species
E. pioneer species


Answer: B

Biology & Microbiology

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At zero population growth:a

b = d. b. b > d. c. b < d. d. r > 0. e. r > K.

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Antibiotics can kill ________________ in the human body, which may sometimes lead to health problems such as inflammatory bowel disease

A. harmful bacteria B. beneficial bacteria C. both harmful and beneficial bacteria D. fungi E. archaeons

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The atom present in all organic compounds is

a. carbon. b. oxygen. c. nitrogen. d. sulfur. e. hydrogen.

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The largest U.S. national parks are of sufficient size to maintain populations of all mammal species originally found in these parks.

a. true b. false

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