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How Does Evolution Happen?
Test Description: 6.2
Instructions: Answer all questions to get your test result.
1) Charles Darwin puzzled over differences in the _____ of the different species of Galapagos finches.
A
beaks
B
bone structure of wings
C
webbed feet
D
eye color
2) Darwin observed variations among individuals within a population, but he did not realize that these variations were caused by
A
selective breeding
B
differences in food
C
differences in genes
D
interbreeding
3) Which of the following factors is necessary for natural selection to occur in a species?
A
a strong family structure
B
genetic variation within a population
C
a hospitable environment
D
an abundance of food resources
4) Which of the following is an example of natural selection?
A
A plant growing between rocks
B
Bears moving into a new part of a forest over many generations
C
A tree growing toward sunlight
D
Shrubs growing longer thorns over many generations
5) Which was NOT a source of Charles Darwin’s ideas about evolution?
A
the writings of Thomas Malthus and Charles Lyell
B
the selective breeding practices of farmers and breeders
C
Darwin’s observations of the Galápagos finches
D
scientific discoveries about DNA and genetic changes
6) Populations of all species are limited by
A
starvation, disease, competition, and predation.
B
genetic change, speciation, adaptation, and separation.
C
breeding, selection, sediment, and ancestry.
D
natural selection, evolution, and division.
7) Modern scientific explanations of evolution
A
fail to explain how traits are inherited
B
have replaced Darwin's theory
C
rely on genetics instead of natural selection
D
combine the principles of natural selection and genetic inheritance
8) What is the process by which organisms that are better adapted to their environment survive and reproduce more successfully than less well adapted organisms do?
A
genetic resistance
B
natural selection
C
species seperation
D
genetic change
9) What evidence of natural selection is available today that was not available to Darwin?
A
there is great variation among organisms
B
organisms inherit traits
C
differences in genes create variation
D
humans can breed organisms for specific traits
10) A spider may produce hundreds of eggs, only a few of which may survive. This is an example of
A
genetic change.
B
division.
C
speciation.
D
overproduction.
*select an answer for all questions
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