Haploid cells are formed in either mitosis meiosis or both

it has one origin of replication, but it proceeds in two directions - d)

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

human didn't come from monkeys man i hate these stupid teachers