3. This is the substance produced by the mint plant in Priestley's experiment
O a. carbon dioxide
b. oxygen
O c. sugars
O d. water

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient

Anonnative species is best described as a species that a. does not normally live in an area b. has no permanent home c. is a poor predator d. increase biodiversity