Complete the anology, Head : brain, Nucleus :

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

What controls activities within a eukaryotic cell?

In order to study genetic mutations, scientists must study genetic material. which statement describes the genetic material scientists are most likely studying? a) they study alleles that contain chromosomes, which are rna.b) they study alleles that contain genes, which are chromosomes.c) they study chromosomes that contain genes, which are dna segments.