Ionic and Covalent bonds I believe :)
The correct answer is C
The plasma membrane is a structure that protects the cell and it's made out of a lipid bi-layer, sugars and proteins. The proteins of the plasma membrane have many functions, some of them are structural, some carry out the cell transport of important molecules and some of them help the cell reactions and are called membrane enzymes . Enzymes are proteins that are capable to speed up a chemical reaction acting as catalysts.
B. ovaries <span /><span> Pr</span><span>ogesterone is produced by the</span><span> </span><span>ovaries. It functions in the inner lining of the uterus.</span><span />
Reproduction, Heredity, Variety in fitness of population, and variety in characters among the population are all four conditions for natural selection.
