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BIO 182 EXAM 2 ASU LATEST 2024/ ASU BIO 182 EXAM 2 (GENERAL BIOLOGY II) 200+ REAL EXAM PRACTICE QUESTIONS WITH CORRECT ANSWERS GRADED A+/ ASU BIO 182 EXAM 2 PREP (NEW!)
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BIO 182 GENERAL BIOLOGY II ASU
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BIO 182 GENERAL BIOLOGY II ASU
BIO 182 EXAM 2 ASU LATEST 2024/ ASU BIO 182 EXAM 2 (GENERAL BIOLOGY II) 200+ REAL EXAM PRACTICE QUESTIONS WITH CORRECT ANSWERS GRADED A+/ ASU BIO 182 EXAM 2 PREP (NEW!)
BIO 182 EXAM 2 ASU LATEST 2024/ ASU BIO 182 EXAM 2 (GENERAL BIOLOGY II) 200+ REAL EXAM PRACTICE QUESTIONS WITH CORRECT ANS...
BIO 182 EXAM 2 ASU LATEST 2024/ ASU BIO
182 EXAM 2 (GENERAL BIOLOGY II) 200+
REAL EXAM PRACTICE QUESTIONS WITH
CORRECT ANSWERS GRADED A+/ ASU BIO
182 EXAM 2 PREP (NEW!)
Giraffes are the tallest animals on land. An adult giraffe has a neck that exceeds 2
m in length. This neck enables a giraffe to access food that other animals cannot
reach and detect predators from a long distance. Studies have shown that giraffes
will browse trees at heights that other herbivores cannot reach. The water and
nutrients gained from leaves enhance a giraffe's fitness by increasing survival and
reproduction. However, a long neck comes with a cost: the heart must spend more
energy to pump blood to the brain. If a giraffe's neck were too long, the energy
required to circulate blood would exceed the energy gained from eating leaves
1. in a population of giraffes the average length of the neck is under directional
selection
2. Over many generations the average length of necks in a giraffe population will
increase indefinitley.
3. the relationship between a giraffes neck length and its fitness would be better
described by a quadratic equation than a linear equation
4. natural selection would reduce the variation in neck length in a population of
giraffes
5. In the absence of mutation the heritability of neck length in a population of
giraffes would remain the same.
1. false- a very short neck limits feeding but a very long neck increases the energy
needed for circulation
2. false- selection against very long necks will occur as the energy required for
circulation exceeds the energy gained by eating leaves on tall trees
3. true- the relationship is likely hump-shaped which is better described by a
quadratic equation
4. true- stabilizing selection reduced the variance of a trait by favoring intermediate
lengths over extreme lengths
pg. 1
,5. false- heritability decreases over generations as natural selection involves some
genotypes reproducing less than others
During the summer, a small pond loses water to evaporation. Eventually, this pond
becomes a series of puddles separated from one another by at least several meters.
Most animals disperse or die as the pond dries, but some microbes still remain in
the puddles. Each of these species used to live in the pond as a much larger
population, but are now subpopulations that reside in the puddles. Some of the
microscopic species with short generations are bacteria, paramecia, and rotifers.
All of these species reproduce asexually, except for one species of rotifer that
reproduces sexually. The puddles remain separated until the following spring,
when abundant rain causes them to expand and form a pond like the one from last
year
1. during the time that subpopulation lived in puddles they would have been
considered sympatric
2. when in separate puddles, genetic drift could cause the evolution of reproductive
isolation in rotifers
3. When the pond reforms the rotifers from each puddle could be considered
different evolutionary species
4. When the pond reforms the bacteria from each puddle would be considered
different biological species.
5. when the pong reforms natural selection would be favor prezygotic isolation
mechanisms that reinforce any ostzygotic isolating mechanisms
1. false- population that live in different spaces are considered allopatric not
sympatric
2. true- although unlikely for such a short period genetic drift in the small
populations could produce traits that isolate them
3. true- they could have evolved by selection and drift in the period of geographic
isolation
4. false- bacteria are asexual and thus cannot be biological species.
5. true- natural selection reinforces post-zygotic isolation mechanisms with pre-
zygotic ones
In epistasis
a. nothing changes from generation to generation.
pg. 2
,b. one gene alters the effect of another.
c. a portion of a chromosome is deleted.
d. a portion of a chromosome is inverted.
e. the behavior of two genes is entirely independent - ANSWER-b. one gene alters
the effect of another.
In a simple Mendelian monohybrid cross, true-breeding tall plants are crossed with
short
plants, and the F1 plants, which are all tall, are allowed to self-pollinate. What
fraction of the F2 generation are both tall and heterozygous?
a. 1⁄8
b. 1⁄4
c. 1⁄3
d. 2⁄3
e. 1⁄2 - ANSWER-e. 1⁄2
The phenotype of an individual
a. depends at least in part on the genotype.
b. is either homozygous or heterozygous.
c. determines the genotype.
d. is the genetic constitution of the organism.
e. is either monohybrid or dihybrid. - ANSWER-a. depends at least in part on the
genotype.
The ABO blood groups in humans are determined by a multiple-allele system in
which IA and IB are codominant and are both dominant to IO. A newborn infant is
type A. The mother is type
pg. 3
, O. Possible phenotypes of the father are
a. A, B, or AB.
b. A, B, or O.
c. O only.
d. A or AB.
e. A or O - ANSWER-d. A or AB.
Which statement about an individual that is homozygous for an allele is not true?
a. Each of its cells possesses two copies of that allele.
b. Each of its gametes contains one copy of that allele.
c. It is true-breeding with respect to that allele.
d. Its parents were necessarily homozygous for that allele.
e. It can pass that allele to its offspring. - ANSWER-d. Its parents were necessarily
homozygous for that allele.
Which statement about a test cross is not true?
a. It tests whether an unknown individual is homozygous or heterozygous.
b. The test individual is crossed with a homozygous recessive individual.
c. If the test individual is heterozygous, the progeny will have a 1:1 ratio.
d. If the test individual is homozygous, the progeny will have a 3:1 ratio.
e. Test cross results are consistent with Mendel's model of inheritance for unlinked
genes - ANSWER-d. If the test individual is homozygous, the progeny will have a
3:1 ratio
Linked genes
a. must be immediately adjacent to one another on a chromosome.
pg. 4
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