Biology 1202 Chapter 24 Exam Questions and Answers| New Update with 100%
Correct Answers
The largest unit within which gene flow can readily occur is a species.
Males of different species of the fruit fly Drosophila that live in the same parts of the Hawaiian
Islands have different elaborate courtship rituals. These rituals involve fighting other males and
making stylized movements that attract females. What type of reproductive isolation does this
represent? behavioral isolation
According to the punctuated equilibria model, most new species accumulate their unique
features relatively rapidly as they come into existence, then change little for the rest of their
duration as a species.
Bird guides once listed the myrtle warbler and Audubon's warbler as distinct species. Recently,
these birds have been classified 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? The two forms interbreed often in nature, and their offspring have good
survival and reproduction.
Which of the following factors would not contribute to al-lopatric speciation? Gene flow
between the two populations is extensive.
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 28.
Suppose that a group of male pied flycatchers migrated from a region where there were no
collared flycatchers to a region where both species were present (see Figure 24.15). Assuming
events like this are very rare, which of the following scenarios is least likely? The frequency
of hybrid offspring would decrease.
Correct Answers
The largest unit within which gene flow can readily occur is a species.
Males of different species of the fruit fly Drosophila that live in the same parts of the Hawaiian
Islands have different elaborate courtship rituals. These rituals involve fighting other males and
making stylized movements that attract females. What type of reproductive isolation does this
represent? behavioral isolation
According to the punctuated equilibria model, most new species accumulate their unique
features relatively rapidly as they come into existence, then change little for the rest of their
duration as a species.
Bird guides once listed the myrtle warbler and Audubon's warbler as distinct species. Recently,
these birds have been classified 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? The two forms interbreed often in nature, and their offspring have good
survival and reproduction.
Which of the following factors would not contribute to al-lopatric speciation? Gene flow
between the two populations is extensive.
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 28.
Suppose that a group of male pied flycatchers migrated from a region where there were no
collared flycatchers to a region where both species were present (see Figure 24.15). Assuming
events like this are very rare, which of the following scenarios is least likely? The frequency
of hybrid offspring would decrease.
