Regions above or below the optimal range of an environmental variable are called:
A) zones of stress.
B) tolerance zones.
C) optimal range areas.
D) None of the above.
E) b and c only.

Question

Quizplus · Accepted Answer

Regions above or below the optimal range of an environmental variable are not within the ideal condition for the organism and therefore cause stress. These areas are known as zones of stress. Choice B, tolerance zones, refers to the range of values within which the organism can survive, not the areas above or below that range. Choice C, optimal range areas, refers to the ideal conditions for the organism and not the areas above or below that range. Choice D is incorrect as it does not refer to any relevant term. Choice E is partially correct, but only option B is relevant, not option C.

Regions Above or Below the Optimal Range of an Environmental