In which of the following ways do social insects benefit most from having several types or castes within the species?
(A) each colony is able to include a large number of individuals
(B) the secretions or odors produced by the protective caste are an effective defense
(C) the division of the species into castes ensures the survival of the fittest
(D) large numbers of the worker caste can migrate to start new colonies
(E) the specialized structure of each caste permits division of labor and greater efficiency
Which of the following statements about imprinting is NOT true?
(A) the capacity for imprinting may be limited to a specific and brief period in the early life of the organism
(B) the behavior pattern associated with imprinting is the result of reward or punishment
(C) the behavior resulting from imprinting is difficult to reverse in later life
(D) a gosling imprinted by a moving wooden decoy may exhibit courting behavior to the decoy in later life
(E) odors and sounds may serve as stimuli for imprinting
Excess sewage can lead to the death of aquatic animals in a lake because sewage pollution promotes
(A) mineral starvation
(B) erosion
(C) thermal stratification
(D) oxygen depletion
(E) a temperature decrease
A katydid is an insect. Its leaf-like appearance is an example of
(A) cryptic coloration
(B) aposematic coloration
(C) Müllerian mimicry
(D) agonistic behavior
(E) Batesian mimicry
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