D) antibiotics since these substances that fungi secrete can kill the bacteria that is in your immune system when your are sick
Oxygen because we need it to breath if that’s the wrong anwser sorry but it should be right
Proteins. <span>The amino acids in a polypeptide chain are linked by peptide bonds. Once linked in the </span>protein<span> chain, an individual amino acid is called a residue, and the linked series of carbon, nitrogen, and oxygen atoms are known as the main chain or </span>protein<span> backbone.</span>
The answer would be C. Energy is used through the food chain so energy always decreases. Population size would commonly decrease according to the pyramid of food chain but since there's no answer for that, C would be the most suitable
The answer is, "B", "Ribosomal RNA".
