What were the first organism to form in early earth?

What process allows for the development of haploid sex cells? mitosis meiosis fertilization pollination

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

What do we call an individual that has inherited two identical alleles for the same trait? a. homozygous b. heterozygous c. monozzygous