In an area with nitrogen-poor soil, legumes often dominate over other plants because they
A) have long taproots that can extract nitrogen from deeper down in the soil.
B) inhibit the growth of denitrifying bacteria around their roots, thus keeping more nitrate in the soil.
C) have unique access to the large atmospheric pool of nitrogen thanks to their symbiotic bacteria.
D) obtain supplemental nitrogen by trapping insects and other prey.
E) do not need nitrogen at all.
C
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What two atoms are found in all organic
compounds?
a. carbon and hydrogen b. carbon and oxygen c. oxygen and hydrogen d. carbon and phosphorous e. oxygen and sulfur
A one-way relationship in which one species benefits at the expense of another is ____
a. commensalism b. competitive exclusion c. parasitism d. obligate mutualism e. a neutral relationship
Suppose a neuron was at rest around -65 mV when it was exposed to a neurotransmitter that caused the neuron to hyperpolarize. Which of the following could be the effect of the neurotransmitter?
What will be an ideal response?
The movement that reduces the angle between two bones is called
a. supination. b. pronation. c. flexion. d. extension. e. adduction.