Electrophoresis draws individual strands of dna across a gel gradient. this process displays the length of each piece of dna in a unique code of lines. this type of technology allows scientists to —

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."

Which of the follow describes a disadvantage secondary sources have compared to primary sources?