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