If a molecule is too large to slip through the spaces in the membrane, how will that molecule enter the cell?
a. the molecule will shrink so that it can fit in the spaces.
b. the molecule will move through a protein channel.
c. the molecule will not enter the cell.

In response to framton's dialogue about his health issues, mr. sappleton replies: "no? " said mr. sappleton, in a voice which only replaced a yawn at the last moment. then she suddenly brightened into alert not to what framton was saying. what does this statement reveal about how mrs. sappleton feels about framton? a) she finds him boring. b) she's happy he came by. c) she finds him annoying. d) she feels sorry for him

Who discovered tuberculosis bacteria?

What might explain the real-world results, show in the graph to the right, for one class of twenty students? check all that apply.