Hydrogen bonds are bonds between a hydrogen in one polar molecule and the negatively charged end of another polar molecule. Hydrogen bonds allow two molecules to link together temporarily. Water molecules are made up of two hydrogen atoms and one oxygen atom, held together by polar covalent bonds.
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I believe it's<u> b. survive and reproduce.</u>
Origins of life number 4 is living beings
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Red blood cells, also called erythrocytes, are the most abundant cell type in the blood.
The primary function of red blood cells is to transport oxygen to body cells and deliver carbon dioxide to the lungs.
Fatty acids and acids both contain a carboxyl group. Hope this helps! :)
