A molecule is two or more atoms bonded together chemically. An atom is the most basic unit of matter. When atoms are chemically bonded together with covalent bonds, molecules are formed. Molecules can be very small like water molecules or extremely large like proteins such as hemoglobin.
A food business such as a restaurant must be certain to purchase their food products from what source ?
- Reliable
<span>Blood pressure is the force of your blood pushing against the walls of your arteries.</span>
