What is gene flow? a. when a population splits in two b. two populations transferring genes c. selection for extreme traits d. a mutation becoming more common

What was the land like over 500 million years ago? what was under the sea?

Which best describes meiosis? a. it produces cells that are identical to the original cell b. it is responsible for the replacement of damaged skin cells c. it is responsible for growth of the organism d. it produces male and female sex cells

Can someone i have no idea of how to do this.