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Bio Exam 4 Pearson Questions with Complete Solutions.
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Bio Exam 4 PearsonA heritable trait is one that - CORRECT ANSWER-is determined at least in part by genes
passed from parents to offspring
A second patient has this treatment and it is again declared a success. Which of the
following happened? - CORRECT ANSWER-the patient started making fetal hemoglobin
According to the Hardy-Weinberg theorem, the frequencies of alleles in a population will
remain constant if _____ is the only process that affects the gene pool. - CORRECT
ANSWER-sexual reproduction
According to the phylogenetic species concept, what is a species? - CORRECT
ANSWER-a set of organisms with a unique genetic history
Adult males humans have a deeper voice than female which is the direct result of higher
levels of testosterone casing growth of the larynx. If the fossil records of apes and humans
show a trend toward decreasing larynx size in adults females and increase in males then -
CORRECT ANSWER-sexual dimorphism was evolving over time in these species
after finding a new medical plant, a pharmaceutical company decides to determine if the
plant has genes similar to those of other known medical plants. What would annotation of
the genome of this plant allow that company to determine? - CORRECT ANSWER-identify
genes and determine their functions
,An early consequence of the release of oxygen gas by plant and bacterial photosynthesis
was to - CORRECT ANSWER-cause iron in the ocean water and terrestrial rocks to rust
(oxidize)
biological species concept - CORRECT ANSWER-can mate and produce fertile viable
offsprings
Biologist now routinely test for homology between genes in different species. If genes are
determine to be homologous, how are they related to each other? - CORRECT
ANSWER-by descent from a common ancestor
BLAST is a computational tool used by genome biologist to - CORRECT
ANSWER-compare a given DNA or protein sequence to all other DNA or protein
sequences in a database
Both male and female hybrids exist, but when they mate among themselves, they are
rarely successful in producing offspring. What can you infer from this information -
CORRECT ANSWER-postzygotic isolation exists between the two frog species
cDNA is synthesized from what molecule using an enzyme known as what? - CORRECT
ANSWER-mRNa
reverse transcriptase
Charles Darwin - CORRECT ANSWER-proposed natural selection as the mechanism of
evolution
, Comparison of the sequences of the same gene across species can give some insight into
the existence of a common ancestor with that gene. - CORRECT ANSWER-true
Darwin and Wallace's theory of evolution by natural selection was revolutionary because it
- CORRECT ANSWER-dismissed the idea that species are constant and emphasize the
importance of variation and change in populations
Dog breeders maintain purity of breeds by keeping dogs of different breeds apart when
fertile. This is most similar to which of the following reproductive isolating mechanisms -
CORRECT ANSWER-habitat isolation
During which step in the PCR cycle are nucleotides used? - CORRECT
ANSWER-extension
During which step in the PCR cycle do primers form bonds with a single-stranded
template? - CORRECT ANSWER-annealing
fossils found in strata reveal that - CORRECT ANSWER-older strata carry fossils that
differ greatly from living organisms
Gel electrophoresis separates DNA fragments on the basis of what characteristic? -
CORRECT ANSWER-length
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