Quiz Chapter 22 pt4

Question 1

Theoretically, the production of sterile mules by interbreeding between female horses (mares) and male donkeys (jacks) should

Answer 1

Strengthen postzygotic barriers between horses and donkeys.

Question 2

According to the concept of punctuated equilibrium, the “sudden” appearance of a new species in the fossil record means that

Answer 2

Speciation occurred rapidly in geologic time.

Question 3

The most likely explanation for the high rate of sympatric speciation that apparently existed among the cichlids of Lake Victoria in the past is

Answer 3

Sexual selection

Question 4

Dogs (Canis lupus familiaris) and gray wolves (Canis lupus) can interbreed to produce viable, fertile offspring. These species shared a common ancestor recently (in geologic time) and have a high degree of genetic similarity, although their anatomies vary widely. Judging from this evidence, which two species concepts are most likely to place dogs and wolves together in a single species.

Answer 4

Biological and Phylogenetic

Question 5

Plant species A has a diploid number of 12. Plant species B has a diploid number of 16. A new species, C, arises as an allopolyploid from A and B. The diploid number for species C would probably be?

Answer 5

28

Question 6

You are confronted with a box of preserved grasshoppers of various species that are new to science and have not been described. Your assignment is to separate them into species. There is no accompanying information as to where or when they were collected. Which species concept will you have to use?

Answer 6

Morphological

Question 7

A narrow hybrid zone separates the toad species Bombina bombina and Bombina variegata. What is true of those alleles that are unique to the parental species

Answer 7

The alleles heterozygosity should be higher among the hybrid toads there.

Question 8

Rocky Mountain juniper (Juniperus scopulorum) and one-seeded juniper (J. monosperma) have overlapping ranges. If pollen grains (which contain sperm cells) from one species are unable to germinate and make pollen tubes on female ovules (which contain egg cells) of the other species, then which of these terms is applicable?

Answer 8

1. Sympatric Species

2. Pzezygotic isolation

Question 9

Bird guides once listed myrtle warbler and Audubon’s warbler as distinct species. Recently, these birds have been reclassified as eastern and western forms of a single species, the yellow-rumped warbler. Which of the following pieces of evidence, if true, would be cause for this reclassification?

Answer 9

Two forms interbreed often in nature, and their offspring have good survival and reproduction.