In 1987, countries worldwide agreed to phase the production of ____________, once a major ozone destroyer, to reduce ozone layer thinning.
Fill in the blank(s) with the appropriate word(s).
Chlorofluorocarbons, CFCs
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Nucleosomes are best described as ____
a. prokaryotic DNA associated with nonhistone proteins b. eukaryotic DNA associated with histone proteins c. prokaryotic DNA associated with histone proteins d. eukaryotic DNA associated with nonhistone proteins e. associated histone and nonhistone proteins
The ____ method is often used to estimate the population size of mobile animals that live within a restricted geographic
range.
a. mark-release-recapture b. direct count c. extrapolation of counts from quadrants to entire population d. plot e. indirect count
Dwarfism may be due to insufficient production of
a. mineralocorticoid. b. glucocorticoid. c. calcitonin. d. GH e. the parathyroid hormone.
The diffusion of water across a plasma membrane is referred to as
A. osmosis. B. facilitated diffusion. C. bulk flow. D. active transport. E. countercurrent flow.