The interaction between two species in which
both species may be harmed is known as
a. parasitism.
b. mutualism.
c. competition.
d. predation.
e. commensalism
C
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____ is an element that is abundant in Earth's atmosphere; however, usable forms of this element (such as ammonia) are comparatively rare in certain soils. To circumvent this problem, soybean plants form symbiotic relationships with bacteria
Fill in the blank with the appropriate word.
In a survey of Dall mountain sheep in Denali National Park in Alaska, researchers found that wolves preyed primarily on the most vulnerable members of the population, the young and the old. What conclusion is best supported by this data?
A. A limited program should be established to cull the sheep population. B. Wolf predation would not be expected to dramatically reduce the sheep population. C. The wolf population is at its carrying capacity, so it is no threat to the sheep population. D. A limited program should be established to cull the wolf population. E. Dall mountain sheep in Denali are an r-selected population.
Angiosperms use which temporary reproductive structures that are not present in any other group of plants?
A. cones B. carpels C. receptacles D. flowers E. seeds
Social behavior in which both the "actor" and the "recipient" benefit is known as ________. [three words]
Fill in the blank(s) with correct word