©THESTAR 2025 ALL RIGHTS RESERVED
BIOLOGY EVOLUTION PRACTICE
EXAM QUESTIONS AND ANSWERS
100% PASS
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
B. new mutations
C. speciation
, ©THESTAR 2025 ALL RIGHTS RESERVED
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%
B. 84%
C. 4%
D. 64% - ANS A. 48%
In the phrase "Survival of the Fittest" the term "Fittest" refers to the organism's
A. suitability for its environment
B. physical strength and speed
C. number of genes
D. brain size - ANS A. suitability for its environment
BIOLOGY EVOLUTION PRACTICE
EXAM QUESTIONS AND ANSWERS
100% PASS
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
B. new mutations
C. speciation
, ©THESTAR 2025 ALL RIGHTS RESERVED
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%
B. 84%
C. 4%
D. 64% - ANS A. 48%
In the phrase "Survival of the Fittest" the term "Fittest" refers to the organism's
A. suitability for its environment
B. physical strength and speed
C. number of genes
D. brain size - ANS A. suitability for its environment
