Answer:
Crossing over occurs between prophase I and metaphase I and is the process where two homologous non-sister chromatids pair up with each other and exchange different segments of genetic material to form two recombinant chromosome sister chromatids.
Explanation:
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Answer: Growing season is short because of it's cold climate.
Explanation:
Tundra is an area of the Earth that has no trees and the climate is cold and windy. There is little rainfall and it is found in top mountains and artic region. The growing season in tundra is very short, usually between 6 to 10 weeks. The temperature is low and cold because there are permafrost that are under the ground, evaporation of water is low because of low temperature.
Answer:
Natural selection
Explanation:
The genetic variation on which natural selection acts may occur randomly, but natural selection itself is not random at all. The survival and reproductive success of an individual is directly related to the ways its inherited traits function in the context of its local environment.
