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Evolution And Genetic Variation
Test Description: 8.L.4
Instructions: Answer all questions to get your test result.
1) Which of the following BEST describes natural selection?
A
Organisms best suited to their environment are most likely to survive and reproduce.
B
Organisms produce more offspring than can survive
C
Organisms compete for food and shelter
D
Organisms vary in their physical traits, and some traits are inherited.
2) Which of the following is a behavioral adaptation?
A
Butterflies producing foul-tasting chemicals
B
Cactus plants having long spines
C
Insects looking like leaves to blend in with real leaves
D
Swallows building nests out of mud
3) Which of the following is MOST LIKELY to cause the extinction of a species?
A
Genetic variation
B
Natural selection
C
A changing environment
D
Mutation
4) Which of the following would NOT be used by a scientist to determine the evolutionary relationship between two species?
A
Fossils
B
Bone structure
C
DNA
D
Population size
5) Which of these are vestigial structures?
A
The hip bones found in some species of snake
B
The thick fur and layer of fat of some mammals in cold climates
C
The sharp thorns of a cactus.
D
The wings of a butterfly
6) Which of these is LEAST likely to show common ancestry?
A
Analogous Structures
B
Vestigial Structures
C
DNA
D
Homologous Structures
7) Which of the following would be an adaptation for survival in the dessert.
A
A plant having large leaves to gather sunlight.
B
An animal being active during the middle of the day.
C
A bird having dark feathers that absorb sunlight and heat.
D
A plant having a thick stem to store water.
8) What is the most likely to happen if an environment changes and a species does not have variations that are helpful in the new conditions?
A
Members of the species will try to change the environment
B
The species will become extinct.
C
Members of the species will develop new adaptations
D
A new species will form from the existing species
9) Which of the following best describes an adaption?
A
Any change in a gene or chromosome.
B
A trait that helps an organism survive.
C
Any trait of an organism
D
A trait that is passed from a parent to its offspring.
10) Which of the following is NOT a type of adaptation?
A
Behavioral
B
Physiological
C
Structural
D
Psychological
*select an answer for all questions
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