Within a community; a dominant species may appropriate a disproportionate share of available
resources, thus __________ other species.
a. increasing competition with
b. increasing disease transmission with
c. undergrazing
d. outcompeting
e. decreasing disease transmission
D
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Blood vessels that return blood from capillaries back to the heart are
(a) arteries. (b) veins. (c) portal veins. (d) arterioles
How do pathogens enter into plant tissues?
A. through wounds or damaged tissues B. through the stomata C. by secreting enzymes that weaken epidermal cells D. on the piercing mouthparts of insects feeding on the plants E. All the answer options are possible means to enter plant tissues.
The methanogens, producers of methane gas, require environments that
A. are directly exposed to sunlight. B. have abundant oxygen and CO2. C. are extremely cold. D. are very acidic. E. are anaerobic with hydrogen gas and CO2.
For ions with a charge of one, which of the following is equal to one milliequivalent?
a. 0.5 millimole b. 2 millimole c. one millimole d. 0.1 millimole