Darwin's Theory

Question 1

A frog has more offspring than can survive on available resources.Of which is this an example?

Revolt · Accepted Answer

B: overpopulation

Question 2

What is natural selection?

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A: a process that selects variations that help with survival and that spreads the variations to more offspring

Question 3

Scientific investigations often lead to the formulation of new scientific questions. Charles Darwin reviewed his observations after he returned home from his voyage studying the selective breeding of pigeons. Which question would he be prompted to ask based on his voyage?

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D: Can selection in nature also lead to a new species over time?

Question 4

Which statement describes natural selection?

Revolt · Accepted Answer

A: It is the primary mechanism for evolution.

Question 5

Natural selection is a process by which organisms that are better adapted to their environment tend to

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D: survive.

Question 6

In terms of natural selection, what is the best description of an organism that is fit?

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C: The organism is better able to survive and pass on traits to offspring than competing organisms.

Question 7

Which statement would least likely be used to describe variation?

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B: Variations that decrease reproductive success are more likely to be passed on.

Question 8

A population of rabbits has individuals with fur coloring that ranges from white to brown. The population lives in a temperate deciduous forest where the summers are mild and average about 50°F. The winters are often below freezing. If warmer temperatures last longer into the fall and the average temperature in the winter is getting warmer, what do you expect to happen to the population?

Revolt · Accepted Answer

B: The percentage of the population with white fur will decrease.

Question 9

Koalas are marsupials that are found in eastern Australia. Although their ancestors lived mostly on the ground, modern koalas spend most of their time in eucalyptus trees. This is possible because their hands and feet have strong claws and opposable digits.What other adaptation could have helped koalas as they evolved from land dwellers to tree dwellers?

Revolt · Accepted Answer

B: fur color that closely matches the eucalyptus bark color

Question 10

During a trip to the Galapagos Islands, which observation led Charles Darwin to suspect that organisms change over time?

Revolt · Accepted Answer

B: Island finches resembled mainland finches, but were not the same species.

Darwin's Theory Answers

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