BCS 1005 Exam 2024 | BCS 1005 Unit 3
Exam (Ch. 11, 14, 15) 2024 Questions
and Correct Answers Rated A+
Africa, Asia, South America, and Antarctica share some patterns of
primitive (fossil) plants and early reptiles, but do not have similar
mammal populations. This therefore -ANSWER-Suggest that the
earlier plants and reptiles evolved while continents were joined but
mammals radiated into diverse groups after separation
Which of these conditions is NOT among the requirements of the
Hardy-Weinberg equilibrium? -ANSWER-Small population w/ genetic
drift
All the members of a species that occupy a particular area and are
able to interbreed are a -ANSWER-Population
Which is NOT one of the preconditions in a population where natural
selection is at work? -ANSWER-The population always becomes
adapted to its enviornment.
Which piece of evidence did Darwin observe during his 5-year journey
aboard the HMS Beagle? -ANSWER-A South American species of
finch is most likely the ancestor of the Galapagos Island finches
During sympatric speciation -ANSWER-reproductive isolation between
certain subpopulations occurs.
During allopatric speciation -ANSWER-a geographic separation
occurs between subpopulations.
,If there is a change in the allele frequency of a gene pool due to
chance, primarily in a small population, it is termed -ANSWER-Genetic
Drift
Almost all living organisms use DNA, ATP, and the same DNA triple
code. This is an example of evolution based on -ANSWER-
Biochemistry (=molecular biology)
Which if the following mechanisms does NOT result in variation in the
gene frequencies from ancestral population? -ANSWER-Genetic
equilibrium
Which of the following would NOT be a cause of sympatric speciation?
-ANSWER-Geographic seperation
Which variable increases the likelihood of allopatric speciation taking
place more quickly? -ANSWER-Longer distance between divided
groups
All mutations either increase of decrease the fitness of an organism. -
ANSWER-False
Within a population, plants that produce a toxin that kills plant-eating
insects are more likely to survive and reproduce than plants that do
not produce the toxin. This would be an example of ______. -
ANSWER-Natural selection
Which of the following would NOT upset Hardy-Weinberg equilibrium?
-ANSWER-All individuals in a population having the same chance at
reproducing.
, Which of the following situations will lead to natural selection? -
ANSWER-All of the above
A small reproductively isolated religious sect called the Dunkers.
Different blood alleles... -ANSWER-The founder effect
The northern elephant seal went through a severe population
decline...hunting...rebounded homozygous. -ANSWER-A bottle neck
Among biologist, the theory of evolution is still controversial. -
ANSWER-False
What is the unifying theory in biology that explains the relationships of
all living things? -ANSWER-Evolution
If two adjacent populations of the same species show gene flow, then
the two populations will -ANSWER-Become more similar in their gene
pools
What evidence would NOT be studied by a biogeographer? -
ANSWER-The genetic make-up of organisms that evolved in separate
but similar conditions.
Inbreeding (mating between relatives to a greater extent than by
chance) within a population is an example of -ANSWER-No random
mating
The observation by _______ that human reproductive potential would
rapidly outstrip available food and living space was an important
concept adopted by Darwin. -ANSWER-Thomas Malthus
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