1)An example of directional selection would be A. breeding for a faster horse B.
ID: 261642 • Letter: 1
Question
1)An example of directional selection would be
A. breeding for a faster horse
B. reduction in inherited potential for body size for mammals on an island
C. reduced age of maturation in response to hunting
D. all of the above
2)Which group of animals are whales most closely related to?
a.
Camels
b.
Fish
c.
Seals
d.
They are equally related to all of the above
3)If the age of sexual maturation is wide-ranging, and is a highly heritable (non-plastic) trait, what relationship would you expect to find?
A. Genotypes differ in the age at which they reproduce.
B. Non-genotypic factors such as environmental variation are primarily responsible for the age at which individuals begin reproducing.
C. Age of sexual maturation is the only trait that is heritable.
D. A high variation in genotype corresponds with a low variation in phenotype
4)Allele frequencies of a population will not change from one generation to the next
A. under the conditions of negative selection.
B. under the conditions of disruptive selection.
C. under the conditions of stabilizing selection.
D. under the conditions of Hardy-Weinberg equilibrium.
5)What is the name of DNA sequences that have lost their protein-coding ability?
a.
Transposons.
b.
Pseudogenes.
c.
Either a or b.
d.
None of the above.
6)Georges Cuvier
A. proposed that extinction occurs
B. discovered RNA to be the heritable material of life
C. discovered DNA to be the heritable material of life
D. all of the above
7)For isochron plots
A. steeper slopes indicate more distant time periods
B. changes in the daughter isotope are modeled on the X-axis
C. they can only model the time at which recent events occurred (within the past century)
D. all of the above
E. A and B, but not C
8)An example of a plesiomorphy is
A. a forelimb (prior to becoming a bird wing)
B. the ability for bats and birds to fly
C. the usage of tools and language
D. all of the above
E. A and B, but not C
9)If it takes 500 years for 50 g of an initial 100 g amount of an isotope to decay into its daughter product, how many years does it take for 10 g of an initial 20 g amount of an isotope to decay?
A. 250 years
B. 500 years
C. 750 years
D. 1000 years
10)The flippers of a dolphin and the fins of a shark:
A. are homologous traits.
B. arose through convergent evolution.
C. resulted from horizontal transfer between birds and mammals.
D. all of the above
E. A and B, but not C
11)How does artificial selection differ from natural selection?
a.
The strength of selection is stronger.
b.
It happens more rapidly.
c.
The selection is goal directed.
d.
Both a and c.
e.
All of the above.
f.
None of the above.
12)When kA>kS, then
a.
Scientists would reject the null hypothesis of neutral evolution because the number of replacement substitutions is greater than expected.
b.
Scientists would accept the hypothesis that the population is undergoing purifying selection because more replacement mutations were found than expected.
c.
Scientists would reject the hypothesis that natural selection took place millions of years ago and is no longer relevant.
d.
Scientists would accept the hypothesis that neutral evolution took place millions of years ago and is no longer relevant.
13) Consider the following protein-coding genetic regions (shown starting with their first codons). How many amino acids would be different between AUGUCAGACGCGAAA and AUGUCAGAGGCGAAC based on the standard universal genetic code?
A. There would be a difference in 1 amino acid when translated.
B. There would be a difference in 2 amino acids when translated.
C. There would be a difference in 3 amino acids when translated.
D. none of the above
a.
Camels
b.
Fish
c.
Seals
d.
They are equally related to all of the above
Explanation / Answer
AS PER CHEGG POLICY, PROCEEDING TO ANSWER A MINIMUM OF FIRST QUESTION, OR, FIRST 4 SUB-QUESTIONS / PARTS / SUBPARTS, THAT IS, IN THIS CASE ONLY QUESTION 1 TO QUESTION 4, UNLESS SPECIFIED/INDICATED TO DO 4 SPECIFIC QUESTIONS BY THE QUESTION UPLOADER:
ANSWER 1)
A. breeding for a faster horse
ANSWER 2)
A. Camels
ANSWER 3)
B. Non-genotypic factors such as environmental variation are primarily responsible for the age at which individuals begin reproducing.
ANSWER 4)
D. under the conditions of Hardy-Weinberg equilibrium
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