Which best describes the permeability of a membrane? O A. The total thickness of the membrane
B. The flexibility of the membrane
C. The number of molecules in the membrane
D. The ability to allow materials to cross a membrane

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different