Nitrogen fixing bacteria convert atmospheric nitrogen into forms of nitrogen that living things can use

Which organelle releases chemicals that break down large food particles into smaller ones?

You arrive late to a biological seminar. however, just as you enter the room, you hear the speaker referring to the "five-prime end" and the "three-prime end" of a macromolecule. immediately, you know that they are talking about a: ]

What goes in and out of a cell respiration?