Through what structure(s) do plants obtain most of their water?
a) roots
b) interior cells
c) stomata
d) leaves

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?

Which statement best describes a typical difference that could be found between the “analysis” and “conclusion” sections of a lab report?

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.