Which statement about atmospheric pressure near earths surface is true?
a. it increases as you move away from earths surface.
b. it decreases as you move away from earths surface.
c. it is constant throughout earths atmosphere.
d. it is measured using a thermometer.

How are the testes and ovaries similar? a. both produce sex cells. b. both connect internal reproductive organs to the exterior. c. both transport sex cells from their site of production. d. both store mature sex cells.

(amoeba sisters video recap: pedigrees and need

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.