The crossing over mechanism of genetic variation results from the exchange of gene segments between non sister chromatids. The correct answer is A.
ANSWER: Nitrogen, oxygen or gas, dust particles
There are two types of polar climate: ET, or tundra climate; and EF, or ice cap climate. A tundra climate is characterized by having at least one month whose average temperature is above 0 °C (32 °F), while an ice cap climate has no months above 0 °C (32 °F).
Decomposer, they eat dead organic material
Answer: C.
Explanation:
Out of all of the answer choices, answer C most properly describes the cell cycle.
