The majority of evaporation of water occurs ____
a. from oceans
b. in the upper atmosphere
c. onto land
d. from land plants
e. from surface ground water
ANSWER: a
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Detritus specifically includes:
a. exclusively organic wastes b. exclusively toxic materials c. small bits of decaying organic matter d. living bacteria and fungi e. toxic wastes and small bits of decaying organic matter
The hormone involved in childbirth that participates in a positive feedback loop is
1.estrogen. 2.progesterone. 3.somatostatin. 4.oxytocin. 5.vasopressin.
Which of the following is least likely to be a
cause of extinction? a. asteroid impact b. human activity c. adaptive radiation d. continental drift e. climate change
The chemiosmotic theory is a concept that ________.
A) the transport of Na+ and K+ across cell membranes is by active transport B) explains how transport by facilitated diffusion reaches a saturation limit C) explains the blood-brain barrier D) a proton gradient drives the formation of ATP