Biogeographic Isolation

Question 1

Which process drives Darwin’s theory of evolution?

Revolt · Accepted Answer

natural selection

Question 2

Which is the best definition of directional selection?

Revolt · Accepted Answer

a process by which one of the extreme variations of a trait is favored

Question 3

A population of pigs lives on an island together with burrowing termites. Pigs that have the longest snouts tend to survive more frequently than those with shorter snouts. Over time, most of the pig population is made up of individuals that have very long snouts. This is an example of which type of selection?

Revolt · Accepted Answer

directional selection

Question 4

Stick insects, also called walking sticks, are typically found in tropical and subtropical forests and grasslands. The insects are able to camouflage themselves by living among twigs in their environment.What is this an example of?

Revolt · Accepted Answer

adaptation

Question 5

Which of the following can result in a population looking more similar over time and can be described as selection against both extremes of a trait?

Revolt · Accepted Answer

stabilizing selection

Question 6

A population of squirrels lived together in a forest. An event occurred that caused the population to diverge into two different species over a long period of time. Which of the following is most likely the event that occurred?

Revolt · Accepted Answer

A natural disaster occurred that separated squirrels.

Question 7

Which of the following is the definition for speciation?

Revolt · Accepted Answer

the evolutionary process through which new species emerge

Question 8

Which type of selection occurs when a population experiences a shift in diversity toward the larger organisms?

Revolt · Accepted Answer

directional selection

Question 9

A population contains short plants and tall plants. The short plants are not able to compete with tall plants for sunlight. The tall plants, however, are more susceptible to wind damage. Which type of selection will this population of plants most likely experience?

Revolt · Accepted Answer

stabilizing selection

Question 10

Which graph represents selection that may lead to reduced variation in a population?

Revolt · Accepted Answer

A graph has trait value on the horizontal axis and population of individuals on the vertical axis. The original population peaks at the same time as the population after selection but the population after selection peaks higher and at a more rapid speed.

Biogeographic Isolation Answers

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