What is true of all genes? A:They use the same kinds of tRNA during protein synthesis b:They have the same DNA sequence c:They have the same mRNA sequence d:They code for proteins with the same amino acid sequence

i think the miocene epoch spans the time from 23 million to 12 million years ago.

answer/// to address the needs of adults with mental illness and increase their ability to function;

the right option is; decreased genetic variation  

decreased genetic variation describes the effect of this environmental change.

genetic variation is the naturally occurring genetic diversities or differences between organisms of the same species in a population. genetic variation allows the survival and adaptability of a species when they encounter changing environmental conditions. when an endangered species reduces, it loses genetic variation which may not be restored even if the species rebound and will only be recovered through the gradual collection of mutations over many years.