Blood vessels that connect networks of capillary beds are
(a) arteries.
(b) veins.
(c) portal veins.
(d) both b and c.
(c) portal veins.
Biology & Microbiology
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Parasitism is a density-independent factor of population control
Indicate whether the statement is true or false.
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Stomach acid does not break down the wall of the stomach because gastric juice contains a powerful base that neutralizes the acid before it can cause damage
Indicate whether the statement is true or false
Biology & Microbiology
A molecule of chlorophyll increases in potential energy when one of its electrons is boosted to a higher-energy excited state on being struck by a photon of light
a. true b. false
Biology & Microbiology