Aeukaryotic cell does not have membrane-bound organelles. is usually smaller than a prokaryotic cell. has membrane-bound organelles. has a cell wall with peptidoglycan. does not usually have a nucleus.

The energy needs of a human population are not affected by

According to the big bang theory, after the "bang," the universe remained dark until about  300,000 yearsone billion yearsthree minutesthree billion years  later, when neutral atoms began to form.

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: ]