This is from Entomology class. please help by answering the all the questions. I

Question

This is from Entomology class. please help by answering the all the questions. I appreciate your help :)

24. Natural selection occurs when

a. nature selects which organisms will survive and reproduce.

b. differential survival and reproduction has a genetic basis.

c. new traits arise in a population because of a changing environment.

d. Two of the above

e. All of the above

27. Sclerites are

a. hardened plates within the exoskeleton.

b. areas of the exoskeleton where plates abut one another creating distinctive lines.

c. areas of the exoskeleton dominated by endocuticle.

d. areas of the exoskeleton where scleritization is initiated immediately after ecdysis.

e. None of the above

28. Members of the Subphylum Hexapoda are characterized by having

a. three tagmata, two pair of maxillae, and one pair of mandibles.

b. three tagmata, two pair of wings, and one pair of mandibles.

c. three tagmata, one pair of maxillae, and one pair of mandibles.

d. two tagmata, one pair of maxillae, and one pair of mandibles.

e. None of the above

32. Introduced insects have a tendency to become pests because

a. they are often brought into a region accidently on the crop plants to which they are specialized.

b. the natural assemblage of predators is not introduced with the pest.

c. agricultural methods used in the new region were developed prior to the introduction of a pest and these methods may enhance the pest’s ability to survive and reproduce.

d. Two of the above.

e. All of the above.

33. Folivorous insects typically remove annually

a. no more than 0.1% of the leaf material produced by a forest.

b. between 2 and 5% of the leaf material produced by a forest.

c. more than 10% of the leaf material produced by a forest.

d. between 5 and 10% of the leaf material produced by a forest.

e. None of the above.

Explanation / Answer

24. (b) differential survival and reproduction have a genetic basis.

27. (a) hardened plates within the exoskeleton.

28. (b) three tagmata, two pairs of wings and one pair of mandibles.

32. (b) the natural assemblage of predators is not introduced with the pests.

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