WorksheetsAP Bio Semester 1 Review, Part 3
Total questions: 7
Worksheet time: 8mins
Name
Class
Date
1.
A researcher notices that in a certain moth species, some females prefer to feed and lay eggs on domesticated solanaceous plants like potatoes and tomatoes. Other females prefer to feed and lay eggs on wild solanaceous plants like Datura. Both male & female moths use scent to find these plants. Females tend to mate where they feed, and the researcher finds a genetic basis for scent preference in these moths. Based on the above information, what might be occurring in this moth species?
a)
divergence in sympatry
b)
divergence due to habitat fragmentation
c)
postzygotic isolation
d)
polyploidization
2.
Beetle pollinators of a particular plant are attracted to its flowers' bright orange color. The beetles not only pollinate the flowers, but they mate while inside the flowers. A mutant version of the plant with red flowers becomes more common with the passage of time. A particular variant of the beetle prefers the red flowers to orange flowers. Over time, these two beetle variants diverge from each other to such an extent that interbreeding is no longer possible. What kind of speciation has occurred in this example, and what has driven it?
a)
allopatric speciation; ecological isolation
b)
sympatric speciation; habitat differentiation
c)
allopatric speciation; behavioral isolation
d)
sympatric speciation; allopolyploidy
3.
The best classification system is that which most closely
a)
unites organisms that possess similar morphologies.
b)
conforms to traditional, Linnaean taxonomic practices.
c)
reflects evolutionary history.
d)
reflects the basic separation of prokaryotes from eukaryotes.
4.
Which statement represents the best explanation for the observation that the nuclear DNA of wolves and domestic dogs has a very high degree of sequence homology?
Dogs and wolves...
Dogs and wolves...
a)
have very similar morphologies.
b)
belong to the same order.
c)
are both members of the order Carnivora.
d)
share a very recent common ancestor.
5.
Which of the following would, if it had acted upon a gene, prevent this gene from acting as a reliable molecular clock?
a)
neutral mutations
b)
genetic drift
c)
mutations with introns
d)
natural selection
6.
A cell is excreting insulin via exocytosis. Which statement most accurately describes why this mechanism of transport is ideal for insulin secretion?
a)
Proteins are small and diffuse readily through the phospholipid bilayer.
b)
Proteins are large molecules that cannot be transported efficiently across the membrane via transport proteins.
c)
Exocytosis provides a mechanism for the passive transport of large proteins.
d)
Small molecules such as polypeptides are transported much more efficiently via bulk transport.
7.
Endosymbiosis is an evolutionary theory that explains the origin of eukaryotes and suggests a specific order in which this might have occurred. Ancestral cells engulfed and then began to use the metabolic processes of the smaller cells. Based on shared core processes and features, which statement most accurately describes the order, the theory and the evolutionary implications for all organisms within domain Eukarya?
a)
Ancestral heterotrophic eukaryotes most likely engulfed both a heterotrophic and autotrophic prokaryote, whereas ancestral photosynthetic eukaryotes probably provided the host cell for the first mitochondria. Over time, natural selection favored these relationships and these cells became the ancestors of all eukaryotes.
b)
As Earth was becoming more aerobic, mitochondria would have provided an advantage to host cells by converting "toxic" oxygen into energy for heterotrophic cells. Since mitochondria are found in all eukaryotes, these combinations likely evolved first. Photosynthetic eukaryotes probably acquired an autotrophic prokaryote, which developed advantageous symbiotic relationship with the host cell.
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