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2024 BIOLOGY 1108 FINAL EXAM WITH CORRECT ANSWERS
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2024 BIOLOGY 1108 FINAL EXAM WITH CORRECT ANSWERS
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2024 BIOLOGY 1108 FINALEXAM WITH CORRECT
ANSWERS
Why is photosynthesis widely but discontinuously distributed throughout the
eukaryotic tree? - CORRECT ANSWERS-Photosynthesis was acquired multiple
times through endosymbiosis.
The term "n" refers to the size of a population, that is, the number of
individuals in that population. In general, in a sample of n individuals, the
frequency of an allele is... - CORRECT ANSWERS-The number of occurrences
of the allele divided by twice the number of individuals in the sample (2n).
If a population is not in Hardy-Weinberg equilibrium, we can conclude that: -
CORRECT ANSWERS-Evolution has occurred because one of the assumptions
of the Hardy-Weinberg equilibrium has been violated.
Why do we think that male Neanderthals mated with non- African ancestral
Homo sapiens? - CORRECT ANSWERS-Because Neanderthal nuclear DNA
sequences are present in the gene pools, and Neanderthal mtDNA sequences
are not.
What is the definition of neoteny? - CORRECT ANSWERS-Retention of juvenile
characteristics in an adult.
How does Homo Nadeli show that he is potentially an intermediate between
modern humans and our more primitive ancestors? - CORRECT ANSWERS-
Nadeli has hands and feet that are human like even though his pelvis and
shoulders are much more primitive than modern humans.
Why do mitochondria and chloroplasts have relatively small genomes? -
CORRECT ANSWERS-Over time much of their nucleic acid has migrated to
the host cell nucleus.
How old are the earliest fossils of eukaryotes as defined by the super
kingdoms? - CORRECT ANSWERS-1.8 billion years
,What causes amoeboid feeding cells of cellular slime molds to aggregate into
a large "slug?" - CORRECT ANSWERS-Starvation
The goldenrod gall fly lays its eggs on the buds of goldenrod plants. Larvae
hatch from the eggs and then chew through the goldenrod buds and into the
stems. The gall fly larvae saliva induces the goldenrod to generate a gall (an
outgrowth of tissue, a ball-shaped swelling on the stem). The larva will live
inside the gall which provides food and shelter for the developing larva.
The larvae are prey of both parasitoid wasps and birds. Wasps selectively
prey on larvae inside the smallest galls while birds selectively prey on larvae
inside the largest galls. The size of the gall made by the larvae is a heritable
trait. Given this information, we can conclude that the trait 'larval gall size' is
subject to: - CORRECT ANSWERS-stabilizing selection
You find that a wild population of antelope is not in Hardy-Weinberg
Equilibrium. From this information alone, can you determine the mechanism
of evolution operating on the population? - CORRECT ANSWERS-No
A population with a novel adaptation has evolved that adaptation. -
CORRECT ANSWERS-True
The peppered moth provides a well-known example of natural selection. The
light-colored form of the moth was predominant in England before the
industrial revolution. In the mid-nineteenth century, a dark-colored form
appeared. The difference is produced by a dominant allele of one gene. By
about 1900, approximately 90% of the moths around industrial areas were
dark colored, whereas light-colored moths were still abundant elsewhere.
Apparently, birds could readily find the light moths against the soot-
darkened background in industrial areas and therefore were eating more
light moths. Recently, use of cleaner fuels has greatly reduced soot in the
landscape, and the dark-colored moths have been disappearing. Should the
two forms of moths be considered separate species - CORRECT ANSWERS-
No.
Three populations of crickets look very similar, but the males have courtship
songs that sound different. What function would this difference in song likely
serve if the populations came in contact? - CORRECT ANSWERS-A prezygotic
isolating mechanism
How are two different species most likely to evolve from one ancestral
species? - CORRECT ANSWERS-Allopatrically, after the ancestral species has
split into two populations.
, Which of the following statements is true regarding hybridization? - CORRECT
ANSWERS-- Hybridization occurs in plants more often than in animals
- Natural selection sometimes acts against progeny that result from
hybridization.
- Hybridization can result in fertile offspring.
- Hybridization involves the transfer of genetic material between members of
similar species.
It is thought that polar bears originated from a population of brown bears
(Ursus arctos) that became geographically isolated during a glaciation event
that occurred about 150,000 years ago (Lindqvist et al., 2010).
The origin of polar bears was the result of - CORRECT ANSWERS-Allopatric
speciation
The Sunshine periwinkle plant blooms in June while Summer periwinkle, a
close relative of Sunshine periwinkle , blooms in August. A researcher is
raising a population of Summer periwinkle in a controlled growth chamber.
Over time the researcher manipulated the day length in the growth chamber
and eventually manages to induce some individuals of Summer periwinkle to
bloom in June. The researcher finds that she can cross these individuals with
Sunshine periwinkle individuals and they produce viable, fertile offspring.
What can she conclude about Sunshine periwinkle and Summer periwinkle? -
CORRECT ANSWERS-These plants are temporally reproductively isolated
from each other.
A polytomy is a graphical depiction of what type of relationship between
groups? - CORRECT ANSWERS-The common ancestor node with no resolution
among descendant groups.
Phylogenetic trees are: - CORRECT ANSWERS-Hypotheses and built using
observed data
When comparing trees with various hypotheses of evolutionary relationships
between a group of animals, the tree with _____ would be the strongest
candidate. - CORRECT ANSWERS-The fewest changes.
A fossil's contribution to phylogenetic trees include: - CORRECT ANSWERS--
Time calibration
- Records of extinct species
- Correlation between evolution and Earth history
How does the level of genetic variation in humans typically compare to other
species? - CORRECT ANSWERS-Lower than other species.
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