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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
bone structure of wings
B
beaks
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 genes
C
interbreeding
D
differences in food
3) Which of the following factors is necessary for natural selection to occur in a species?
A
a hospitable environment
B
a strong family structure
C
genetic variation within a population
D
an abundance of food resources
4) Which of the following is an example of natural selection?
A
A plant growing between rocks
B
A tree growing toward sunlight
C
Shrubs growing longer thorns over many generations
D
Bears moving into a new part of a forest 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
scientific discoveries about DNA and genetic changes
C
the selective breeding practices of farmers and breeders
D
Darwin’s observations of the Galápagos finches
6) Populations of all species are limited by
A
breeding, selection, sediment, and ancestry.
B
natural selection, evolution, and division.
C
genetic change, speciation, adaptation, and separation.
D
starvation, disease, competition, and predation.
7) Modern scientific explanations of evolution
A
rely on genetics instead of natural selection
B
fail to explain how traits are inherited
C
combine the principles of natural selection and genetic inheritance
D
have replaced Darwin's theory
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
species seperation
B
natural selection
C
genetic resistance
D
genetic change
9) What evidence of natural selection is available today that was not available to Darwin?
A
humans can breed organisms for specific traits
B
differences in genes create variation
C
there is great variation among organisms
D
organisms inherit traits
10) A spider may produce hundreds of eggs, only a few of which may survive. This is an example of
A
division.
B
overproduction.
C
genetic change.
D
speciation.
*select an answer for all questions
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