Question

please answer all!

12. Over time, the movement of people on Ear las steadily increased. This has altered the course of human evolution by increasing a. nonrandom mating b. geographic isolation c. genetic drift d. gene flow 3. Which of the following statements describes temporal isolation in different species that are trying to breed? a two species live in different habitats b. two species mate at different times c. two species share courtship activities d. two snails have shells that spiral in different directions t grown in outer space would lack this Phototropism Gravitropism ytokinins xins

Answer 1

12. Option D is correct
The migration of organisms from one region to other regions increases gene flow among different populations.
This allows the exchange of genetic material between different populations and reduces the chances of speciation.

13. Option B is correct
temporal isolation of reproduction = Two organisms cannot breed in natural conditions as their breeding seasons are different
i.e. their reproductive maturation/behaviors are not synchronized.

14. Option B is correct
The outer space does not possess a significant amount of gravity. Hence plants grown in outer space would lack gravitropic response.

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