What is osmosis? * A. Diffusion of water through a semi-permeable membrane
O B. A type of active transport
C. The movement of sugar into a cell
D. none of the above

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system

How does a gymnosperm prevent itself from pollinating the same tree

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis