What are the 3 parts of the Earth (from out to
in)?

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.

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

If it turned out dinosaurs were colorblind, how would this affect some assumptions scientists have made about them?