When they compare they can see the difference and similarities to get to the end result
It would be A to protect and support the cell hope this helps
Answer:
I wrote all of this on the thing, but it wouldn't work. Here is the PDF I did. Good Luck.
Explanation:
The crossing over is a process that is essential to human genetic diversity. During the crossing over parts of the homologous chromosomes ( two chromosomes identical by structure, but different in origin, one inherited from the mother and one from the father) randomly exchange parts of their sequences.
If the crossing-over didn't exist, this would greatly decrease the genetic diversity, because the chromosomes would always bee passed o the next generations unchanged.