Which of the following is the most powerful evolutionary force in large populations over time?
a. genetic recombination
b. migration
c. natural selection
d. mutation
i said c, but when i submitted the quiz, my grade was a "d". any will be much appreciated.

Which statement correctly compares metaphase i and metaphase ii? in metaphase ii twice as many chromosomes line up along the middle of the cell as in metaphase i. in metaphase i twice as many chromosomes line up along the middle of the cell as in metaphase ii. in metaphase ii twice as many chromosomes are pulled to opposite ends of the cell as in metaphase i. in metaphase i twice as many chromosomes are pulled to opposite ends of the cell as in metaphase ii.