Difference between ostium and osculum

What best describes the structure of the declaration of independence?

What is responsible for the uneven heating between the poles and the equator on any given day

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.