When the free energy of the reactants is greater than the free energy of the products, such a reaction is
referred to as:
a. an entropic reaction.
b. an endergonic reaction.
c. an exergonic reaction.
d. an enthalpic reaction.
e. an activation reaction.
C
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Excess nutrients in the aquatic environment can cause an initial population surge of primary producers, but eventually results in a collapse of the ecosystem. Which of the following answer choices is not a direct reflection of this statement?
A. Habitats have a particular carrying capacity. B. All trophic levels can be interdependent. C. Communities are shaped by the physical environment. D. Animals interact with their physical environment.
The adjustable ring of circular and radial muscles that controls the amount of light entering the eye is
the a. lens. b. cornea. c. pupil. d. iris. e. retina.
Which of the following is an important characteristic for a model organism?
A) marginally characterized B) difficult to manipulate in the laboratory C) prone to random changes that alter primary characteristics D) widely studied E) all of the above
Which group would be an ecological population of organisms?
A) all chipmunks in a wood lot B) all plants in a garden C) all animals in a zoo D) all plants and animals in a rainforest