Describe all eras the earth has been through

Why aren't the stains like crystal violet and safranin washed away with water during simple staining?

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

Which particle controls what element an atom is?