9) How do the shapes of our ears help us to hear? 1.The ridges in the ear help us capture sound
2.Our ears are large allowing them to pick up quieter sounds
3.Our ears are shaped like a funnel, allowing sound to be funneled into our ear canal
4.Our ears are placed on the side of our head to maximize the sounds we car hear

Environmental impacts on evolution : mastery test

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?

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.