In general, species richness follows a longitudinal gradient

Indicate whether the statement is true or false.


ANS: F, latitudinal

Biology & Microbiology

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The genetic variation that exists among humans is mainly due to the differences that exist within their ________

a. alleles b. ribosomes c. parents d. cell membranes e. cells

Biology & Microbiology

During contraction,

a. cross-bridges of muscle filaments are broken and reformed. b. ATP is used to break cross-bridges. c. muscle cells use glucose derived from glycogen as an energy source. d. glycogen depletion may lead to muscle fatigue. e. all of these occur.

Biology & Microbiology

The countercurrent exchange system found in fish gills maximizes gas exchange efficiency by:

a. producing rapid water flows across the gill surface. b. allowing water and blood to come in direct contact to maximize oxygen exchange. c. having the most oxygen-depleted blood come in contact with the most oxygen-rich water. d. having the most oxygen-depleted blood come in contact with the most oxygen-depleted water. e. decreasing the oxygen content of the blood leaving the gill filaments

Biology & Microbiology

Modern pregnancy tests use ________ antibodies produced against a pregnancy hormone as the antigen.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology