In the year 2317, a group of human pioneers decide to colonize mars. the distance between mars and earth prevents the possibility of new members joining the colony or the members of the colony interbreeding with humans on earth. this situation is an example of:

Founder Effect

Explanation:

Founder Effect Definition

The founder effect occurs when a small group of people move away from the original large population to form their own small population far away from the original population.

This means even their resemblance will begin to change as they start to resemble the founder of the small group and they will no longer look like the original population since there is no longer a chance to interbreed.

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.