During diffusion, molecules move
a) in no predictable pattern.
b) to points equidistant from the point of origin.
c) from lower concentration to higher concentration.
eliminate
d) from higher concentration to lower concentration.

Scientific thinking: what clues about biology might road kill provide?

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

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