What is the term for each step in the transfer of energy and matter within a food web?

Hey me with this one❤☺❤ how do you say that a cell also has a life span and death like an organism? give one example.

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: ]

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.