What's the name of the spot at the top of the nose between the eyes?

What do all macromolecules have in common with each other? oa. they all are formed from the same elements.ob. they all have major roles in cell membranesoc. they all act as catalysts in the body.od. they all have peptide bonds between carbon atoms.

Apart of an ecosystem that can restrict the growth of a population is referred to as

Plz ! ive been stuck on this forever