Answer:
A cell is basically made of biological molecules (proteins, lipids, carbohydrates and nucleic acids). These biomolecules are all made from Carbon, hydrogen and oxygen. Proteins and nucleic acids have Nitrogen.
Explanation:
Answer:
The blood vessel from lungs to heart is pulmonary vein which carries oxygenated blood.
Elliptical galaxies. I hope thats correct.
Because an amino acid<span> cannot be </span><span>synthesized</span><span> by the organism, and it must be supplied in its diet.</span>
D bc active transport is basically the opposite of osmosis and diffusion
