How dou you know that species are different

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: ]

Organisms that successfully adapt will leave to grownone of the above

Which description provides the best objective summary of the article in the passage?