Of the 20 amino acids used by the human body, how many are considered nonessential?

Aseries of connections of food chain in an ecosystem is called a what

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.