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MGCCC Bio II Final Exam With Complete Solution
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MGCCC Bio II Final Exam WithComplete Solution
Darwin - Answer a naturalist who studied finches
Lamarck - Answer giraffe thing
Envelope - Answer membrane that surrounds the protein coat on some viruses
Genetic drift - Answer may lead to loss of genetic varriation in population
Capsid - Answer protein coat on a virus
p2 - Answer frequency of homozygous dominant
2pq - Answer frequency of heterozygous genotype
Cladistics - Answer A phylogenetic classification system that uses shared derived
characters and ancestry as the sole criterion for grouping taxa.
The red fox's reddish coloring allows it to blend into its forest habitat, while the kit fox's
beige coloring allow it to blend into its desert environment. The red fox has small ears,
while the kit fox has large ears to help rid its body of heat. Which of the following
statements gives the BEST explanation for the differences between these two foxes? -
Answer The foxes evolved differences in appearance as they adapted to different
environments.
Bufo woodhousei & Bufo cognatus are two closely related species of toads. In areas
where their ranges (where they live) overlap, the toads will remain separate species if
they: - Answer Breed in different seasons
A population of bacteria is treated with an antibiotic. How will variation in the population
of bacteria increase the likelihood of survival? - Answer Some of the bacteria may be
resistant to the antibiotic.
Which of the following was NOT one of Darwin's observations? - Answer Most individuals
have an equal chance to survive and reproduce.
As the trees in England become less sooty due to pollution controls on factories, which
of the moths would have been selected against? - Answer The black moth.
Similar body parts are not always homologous. They may have evolved independently in
separate lineages (ex: whales and sharks) as adaptations to the same: - Answer
Environmental pressures.
If the frequency of a recessive gene in a population under genetic equilibrium is 40%,
what would you expect to be the frequency of the dominant gene in a population? -
, Answer 60
The graph shows both human birth weight and newborn infant mortality. The most
common birth weight is between 7-8 pounds. Human birth weight seems to be an
example of: - Answer Stabilizing Selection.
DDT was a pesticide that was used until the 1970s. When DDT was first introduced,
insects were very susceptible to it and died. Later in its use it was noticed that some
insects developed a resistance to DDT. This was most likely the result of: - Answer
Natural Selection of forms that expressed genes for resistance.
The Hardy-Weinberg rule is: - Answer Useful in determining the extent to which a
sexually reproducing population is evolving.
Charles Darwin found several species of finches on the Galapagos Islands. The different
species were similar except in the shape and size of their beaks, as shown in the
diagram below. Darwin hypothesized that the finches on the islands had evolved from a
common ancestor. Which of these was a factor that allowed one species of finch to
evolve into several different species? - Answer Many different types of food were
available.
A meadow has always sustained a large population of land snails. During a major flood,
a large lake forms that divides the snails into two separate populations. After millions of
years apart, the two snail populations will MOST likely: - Answer Become different
species
According to the diagram below, during the last 40 million years, the structure of the
horse's foot has: - Answer Lost its toes.
Scientists often determine the relatedness of different species by comparing the
structures of their bones. The skulls of four mammals are shown above. Using the
structures of the skulls below, which two animals are MOST CLOSELY related? - Answer
Animals 2 & 4
Which of the following is the best definition of sympatric speciation? - Answer
In a mouse population inhabiting a grassland area, a mutation occurs that results in a
new coat color allele. Which of the following factors has the GREATEST effect on
whether the new coat color will become more common in the mouse population? -
Answer Whether the new coat color allele increases the survival of mice in their
environment.
An isolated population of fritillary, a species of butterfly, lives in a damp meadow. The
fritillary larvae feed only on a species of violet plant that lives in the meadow. One
summer, a virus causes the violet plants to die. Without genetic variation, as a result of
the absence of violets, the fritillary population will MOST LIKELY: - Answer Decrease in
number
Suppose a population of flightless beetles becomes divided into two separate
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