QUESTION 7 Two species of squirrels live on either side of the Grand Canyon. It

Question

QUESTION 7 Two species of squirrels live on either side of the Grand Canyon. It is believed that a long time ago, before being separated by the canyon, they were the same species. This is an example of O hybrid inviability. O mechanical isolation. O allopatric speciation. O temporal isolation. O behavioral isolation. QUESTION 8 A change in the genetic makeup of a population is called O artificial selection. O uniformitarianism. O evolution. O natural selection. QUESTION 9 Which trait is the best example of an adaptation? O A shorter neck in a giraffe that lives in an area with many rival males and tall trees O A longer tongue in an insect-eating mammal that feeds on insects that live in shallow burrows O A mutation resulting in a heat-resistant enzyme in a bacterium living in a hot spring O A mutation resulting in weak branches in a species of tree that lives in windy regions O A new mutation that confers Tay-Sachs disease in humans QUESTION 10 Which English economist wrote that the human population "increases in a geometrical ratio" and would soon exceed Earth's capacity to support it? O Wallace O Hutton O Malthus O Lyell O Mendel QUESTION 11 Which of the following phenomena favors individuals with average phenotypes over those with extreme O Genetic drift O Stabilizing selection O Coevolution O Sexual selection O Gene flow phenotypes? QUESTION 12 One species of moss in upstate New York produces gametes in May, and another species of moss in the same region produces gametes in June. This is an example of afn)isolating mechanism.

Explanation / Answer

8)- option c is correct because change in genetic makeup is evolutionary change.

9)-option a is correct because in it giraffe adapt itself in the environment.

10)-option c is correct because Malthus wrote that human population increase in geometrical ratio.

11)- option b is correct because it select against extreme phenotype.

12)- it is behavioral isolating mechanism.

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