What reef formation is the most common?

a. Spur-and-groove
b. Reef front
c. Reef crest
d. Drop off


a

Biology & Microbiology

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Drowned river valley estuaries were formed by:

a. tectonic activity. b. the scoring effect of glaciers. c. rising sea levels after glacial periods. d. both a and b. e. none of the above.

Biology & Microbiology

Radioactive isotopes have ____

a. excess electrons b. excess protons c. excess neutrons d. insufficient neutrons e. insufficient protons

Biology & Microbiology

Which of the following is classified as a trace element in the human diet?

a. potassium b. iron c. sulfur d. magnesium e. sodium

Biology & Microbiology

The autonomic nervous system contains the sympathetic and the parasympathetic nervous system.

a. true b. false

Biology & Microbiology