We need blood because it carries oxygen and helps us sustain life. The organ that pushes blood through the body is the heart.
mostly collagen and some calcium phosphate
Answer:
Molecules.
Explanation:
Molecules are the items that attach on the inside of the mineral to give the mineral its shape. The molecule of a mineral is a crystal three-dimensional regular structure (arrangement) of chemical particles that are bonded together and determines its shape.
Due to the fact that, these molecules are structurally arranged or ordered and are repeated by different symmetrical and translational operations they determine the shape of minerals.
The answer is B. Speed up chemical reactions. Hope this helps.
