Classify each event in the history of life into the appropriate eon or era. a- dinosaurs evolve and radiate
b- humans appear
c- oldest fossils of cells (prokaryotes) appear
d- origin of mammals
e- oldest fossils of eukaryotic cells appear
f- major radiation of pollinating insects
g- origin of Earth
h- first invertebrates appear
i- first tetrapods and insects appear
j- the Cambrian explosion
Hadean eon
Archaean eon
Proterozoic eon
Paleozoic era
Mesozoic era
Cenozoic era

What is a question answer because there is no answers and i need answers for the question

The answer would be c, white eyes are homozygous recessive. in the early 1900s, morgan conducted several experiments with vinegar  flies (drosophila). one  sample revealed an anomaly: a  white-eyed, single male fly. he attempted to breed this fly with the typical red-eyed females. the offspring were all red-eyed. using flies from this new generation (brother-sister pairs)  produced some red-eyed and a few white-eyed flies. the white-eyed were all male. in later experiments, he was able to produce white-eyed females. this proved that white eyes are not lethal to either sex (ruling out a and b). since the percentage of white eyes to red eyes is so low, white eyes are not a dominant trait. it would be a recessive trait. 

Droughts cause very arid places such as a desert