Intertidal mud flats in tropical regions are typically composed of

A) salt marshes.
B) peatlands.
C) mangrove forests or mangals.
D) oysterbeds.


C

Biology & Microbiology

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The only survivors of a colony on Venus are a man and a woman, who both happen to originally be from southern

Ukraine. Their descendants will show the effect of ____.

a. genetic drift b. punctuated equilibrium c. excessive mutation d. heterozygote advantage e. frequency-dependent selection

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During G2, a cell produces ________

a. daughter cells b. the bipolar spindle c. proteins that drive mitosis d. newly synthesized DNA

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In some G-protein-coupled-receptors, cyclic AMP (cAMP) acts as a(n)

1.first messenger. 2.second messenger. 3.effector. 4.protein kinase. 5.extracellular signal.

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Normal bacterial inhabitants of the human body

a. are naturally resistant to antibiotics. b. are able to out-compete some invading pathogens and thus are one of the body’s initial defense mechanisms. c. can be transformed into pathogenic forms if a person’s resistance to disease is low. d. are unable to survive the human body’s defense mechanisms. e. are able to out-compete some invading pathogens and thus are part of the body’s innate immunity.

Biology & Microbiology