Why opposable thumbs became a common trait in primates

Which element provides strength to the exoskeleton of clams and oysters

What is the process of pulling apart an n2 molecule nevermind i got it

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.