Through meiosis and sexual reproduction, children that are produced from parents are almost guaranteed to be unique. .

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

Are the earth's ocean floor and continents the same age geologically? why or why not?

Anton created a chart listing different types of materials. which best complete the chart?