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BIOLOGY EVOLUTION PRACTICE TEST/ACTUAL
EXAM QUESTIONS & ANSWERS SOLVED 100%
CORRECT/NEWEST UPDATE Questions and Correct
Answers/ Latest Update / Already Graded
According to Darwin, the driving force behind evolution is
A. gene mutation
B. natural selection
C. inheritance of acquired traits
D. larger animals eating smaller animals
Ans: B. natural selection
A gene mutation in a certain flower allows the flower to produce more seeds.
The seeds each have the same chance of producing a new plant as do seeds from
flowers that do not possess this mutation. It can be expected that
A. the mutated gene will become more common in the next generation of these
flowers
B. the mutation will kill the flowers that don't have the mutation
C. the other plants in the area will develop the same mutation
D. the seeds with the mutation will taste better to animals
Ans: A. the mutated gene will become more common in the next generation of
these flowers
A population of people are isolated on an island, with no new immigrants over
many generations. For this group, any new genetic variations are most likely to
come from
A. natural selection
© 2025/ 2026 | ® All rights reserved
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B. new mutations
C. speciation
D. recessive alleles
Ans: B. new mutations
Edible fruit is an adaptation in some flowering plants that provides an advantage in
A. making the plant more attractive
B. attracting bees for fertilization
C. widespread dispersal of seeds
D. getting more people to grow it
Ans: C. widespread dispersal of seeds
Polydactyly (having six fingers per hand) is a hereditary condition caused by a
dominant gene. The rarity with which this condition is seen in human populations
is probably because
A. persons with polydactyly are infertile
B. the allele for polydactyly is rare
C. the trait makes people undesirable mates
D. the trait is lethal
Ans: B. the allele for polydactyly is rare
In a population of white and brown rats, 16% of the rats have a white coat.
Assuming that white coat color is a recessive trait, what percentage of the rats
are heterozygous for the color allele?
A. 48%
© 2025/ 2026 | ® All rights reserved
BIOLOGY EVOLUTION PRACTICE TEST/ACTUAL
EXAM QUESTIONS & ANSWERS SOLVED 100%
CORRECT/NEWEST UPDATE Questions and Correct
Answers/ Latest Update / Already Graded
According to Darwin, the driving force behind evolution is
A. gene mutation
B. natural selection
C. inheritance of acquired traits
D. larger animals eating smaller animals
Ans: B. natural selection
A gene mutation in a certain flower allows the flower to produce more seeds.
The seeds each have the same chance of producing a new plant as do seeds from
flowers that do not possess this mutation. It can be expected that
A. the mutated gene will become more common in the next generation of these
flowers
B. the mutation will kill the flowers that don't have the mutation
C. the other plants in the area will develop the same mutation
D. the seeds with the mutation will taste better to animals
Ans: A. the mutated gene will become more common in the next generation of
these flowers
A population of people are isolated on an island, with no new immigrants over
many generations. For this group, any new genetic variations are most likely to
come from
A. natural selection
© 2025/ 2026 | ® All rights reserved
, 2 | Page
B. new mutations
C. speciation
D. recessive alleles
Ans: B. new mutations
Edible fruit is an adaptation in some flowering plants that provides an advantage in
A. making the plant more attractive
B. attracting bees for fertilization
C. widespread dispersal of seeds
D. getting more people to grow it
Ans: C. widespread dispersal of seeds
Polydactyly (having six fingers per hand) is a hereditary condition caused by a
dominant gene. The rarity with which this condition is seen in human populations
is probably because
A. persons with polydactyly are infertile
B. the allele for polydactyly is rare
C. the trait makes people undesirable mates
D. the trait is lethal
Ans: B. the allele for polydactyly is rare
In a population of white and brown rats, 16% of the rats have a white coat.
Assuming that white coat color is a recessive trait, what percentage of the rats
are heterozygous for the color allele?
A. 48%
© 2025/ 2026 | ® All rights reserved
