If organisms A, B, and C belong to the same class but to different orders and if organisms C, D, and E belong to the same order but to different families, which of the following pairs of organisms would be expected to show the greatest degree of structural homology?

#Question id: 11777

#Section 2: Evolution

Some of the species of stalk-eyed flies are sexually dimorphic, with males having eye stalks up to twice as long as those in females. This gender difference in eye span results from selection by females on the expression of this trait in males, a process called __________.

#Question id: 3420

#Section 2: Evolution

Following are key points about the effect of genetic drift:

A. Genetic drift is significant in small populations.

B. Genetic drift can cause allele frequencies to change in a pre-directed way.

C. Genetic drift can lead to a loss of genetic variation within populations.

D. Genetic drift can cause harmful alleles to become fixed.

Which one of the following combination of the above statements are true?

#Question id: 3439

#Section 2: Evolution

Male insects attempt to mate with orchids but eventually stop responding to them. What term best applies to this behavior?

#Question id: 3445

#Section 2: Evolution

Which one of these concepts is not associated with sociobiology?

#Question id: 10839

#Section 1: Ecology

Which of the following statements about plants and herbivores is true?