Multiple Choice Identify the
choice that best completes the statement or answers the question.
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1.
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Which of the following must happen for a new species to evolve?
a. | Isolation | b. | Adaptation | c. | Differentiation | d. | All of the
above |
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2.
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When a population becomes divided by an event such as a new river forming, ____
has occurred.
a. | differentiation | b. | isolation | c. | adaptation | d. | separation |
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3.
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Variations in a population are caused by:
a. | natural selection. | b. | selective breeding. | c. | artificial
selection. | d. | random mutations. |
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4.
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Extinction occurs when ____ happens.
a. | loss of habitat | b. | isolation | c. | differentiation | d. | adaptation |
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5.
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If an environment changes, populations with ____ have a better chance of
survival.
a. | no genetic variations | b. | genetic variations | c. | a small
number | d. | a large number |
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6.
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The climate of a certain area is cold, and snow is found on the ground most of
the year. Equal numbers of two populations of rabbits are introduced into this climate by a group of
scientists. One of the populations is brown and the other is white. Predict what will happen over
several generations.
a. | There will be equal numbers of brown and white rabbits. | b. | There will be more
brown rabbits that white rabbits. | c. | There will be more white rabbits than brown
rabbits. | d. | There is no way to predict what will happen to the rabbit
population. |
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7.
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The variations within a population will most likely be passed on to future
generations if they are:
a. | due to a mutation and result in beneficial variations. | b. | due to a mutation
and result in harmful variations. | c. | not due to a mutation and result in harmful
variations. | d. | not due to a mutation and result in beneficial
variations. |
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Short Answer
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1.
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How do mutations occur in an organism and how do they affect a
population?
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2.
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How does isolation lead to the evolution of a new species?
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3.
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Why do populations with many variations have a better chance of survival
than a population with little or no variations?
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4.
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What is meant by the term extinction? List
three causes of extinction.
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