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BIOLOGY 1108 EXAMS/
UNIVERSITY OF CONNEC TICUT
BIOL 1108 EXAMS 1-3 (ANSWERED)
SPRING
Question : 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 the number of occurrences of the allele divided by twice the number of individuals in the sample (2n).twice the number of occurrences of the allele divided by n.
Correct answer: the number of occurrences of the allele
divided by twice the number of individuals in the sample (2n).
Question : If a population is not in Hardy-Weinberg
equilibrium, we can conclude that:
Correct answer: evolution has occurred because one of
the assumptions of the Hardy-Weinberg equilibrium has been violated.
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Question : 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.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:
stabilizing selection.
Correct answer: stabilizing selection.
Question : 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 answer: no
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Question : A population with a novel adaptation has
evolved that adaptation.true
Correct answer: true
Question : Why do mitochondria and chloroplasts have
relatively small genomes?
Correct answer: Over time, much of their nucleic acid has
migrated to the host cell nucleus
Question : How old are the earliest fossils of eukaryotes ?
Correct answer: 1.8 billion years
Question : What causes amoeboid feeding cells of cellular
slime molds to aggregate into a large multicellular 'slug'?
Correct answer: starvation
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Question : Why is photosynthesis widely but
discontinuously distributed throughout the eukaryotic tree?
Correct answer: Photosynthesis was acquired multiple
times through endosymbiosis
Question : Which of the following enabled eukaryotes to
evolve complex life cycles and programs of multicellular development?
Correct answer: complex patterns of gene regulation
Question : Cells in the interior of complex multicellular
organisms are able to respond to environmental signals
through:
Correct answer: receptors for signals sent from exterior
cells that relay information about environmental changes.
Question : How can two cells of a complex multicellular
organism have the same genome, but markedly different structures and functions?