Factors Affecting Biological Diversity-Standard Bio 4.4

Question 1

Explain why scientists believe the Abert’s and Kaibab squirrels are examples of speciation.

Revolt · Accepted Answer

Scientists believe the Abert’s and Kaibab squirrels are examples of speciation because they were geographically isolated by the formation of the Grand Canyon. The Abert’s squirrel lives on the South Rim, while the Kaibab squirrel is isolated on the North Rim. Erosion separated the forests, preventing the two populations from interbreeding, which allowed them to develop distinct physical characteristics over time.

Question 2

Which of the following support the importance of geographic isolation as stated in the article? Check all of the boxes that apply.

Revolt · Accepted Answer

B: distribution and abundance of organisms; C: speciation of plants; D: Antarctic convergence

Question 3

Explain the process of evolution through isolation that results in speciation.

Revolt · Accepted Answer

Speciation through isolation occurs when a founding population becomes separated by a physical barrier, leading to biogeographic isolation. Because the environments of the separated groups are different, natural selection acts on genetic mutations and changes within each group independently. Over time, these differences accumulate until the populations can no longer interbreed, resulting in reproductive isolation and the formation of distinct species.

Question 4

What did you include in your response? Check all of the boxes that apply.

Revolt · Accepted Answer

A: The Abert’s squirrel is found on the south rim of the grand canyon and surrounding states.; B: The Kaibab squirrel can only be found at the north rim of the canyon.; C: Scientists believe they were separated by plateau erosion that separated the forests of the Grand Canyon, isolating the Kaibab population of squirrels.

Question 5

How can speciation of plants benefit humans?

Revolt · Accepted Answer

Speciation of plants can benefit humans by increasing biodiversity, which allows for the discovery of new plant species. These new species may provide important resources, such as new food sources or unique chemical compounds that can be used to develop new medicines.

Question 6

What did you include in your response? Check all of the boxes that apply.

Revolt · Accepted Answer

AssessCtrla111a89f-aded-4c20-aae9-e27e5cb16b97_1_A,AssessCtrla111a89f-aded-4c20-aae9-e27e5cb16b97_1_B,AssessCtrla111a89f-aded-4c20-aae9-e27e5cb16b97_1_C,AssessCtrla111a89f-aded-4c20-aae9-e27e5cb16b97_1_D

Question 7

What did you include in your response? Check all of the boxes that apply.

Revolt · Accepted Answer

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Factors Affecting Biological Diversity-Standard Bio 4.4 Answers

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