A hummingbird that pollinates morning glory
flowers and nests in the crotch of an apple tree.
The apple tree is not harmed or helped by the
hummingbird. The relationship between the
hummingbird and the apple tree is a
a. mutualism.
b. commensalism.
c. competition.
d. parasitism.
e. predation
B
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In the collecting ducts of the kidney, antidiuretic hormone promotes water conservation by increasing the levels of
A. aquaporins. B. G-protein coupled receptors. C. vasopressin. D. Na+/K+ ATPase. E. Na+/glucose symporters.
What is a global impact of glacier recession?
a. lower crop yields b. increased precipitation c. rising sea levels d. fewer tropical storms
Which of the following ions plays the most prominent known role in the opening and closing of
stomata?
a. Ca2+ b. Cl? c. K+ d. NH4 + e. Na+
What scientist(s) first demonstrated in the laboratory that organic compounds could be synthesized in an abiotic environment?
a) Rosalind Franklin b) Haldane and Oparin c) Urey and Miller d) Watson and Crick e) Anton Van Lueenhoech