List the four eras on the geologic time scale describe one identifying type of organism from each era

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.

List the substances normally stored in bone tissue

Which of the following is directly affected by the cardiovascular system?