Question 1 A) Osmosis is a form of passive transport. Which defines osmosis? (1 point) the movement of water across a semipermeable membrane down a concentration gradient from high to low, using no energy the movement of water across a semipermeable membrane down a concentration gradient from high to low, using energy the movement of water across a semipermeable membrane up a concentration gradient from low to high, using no energy the movement of water across a semipermeable membrane up a concentration gradient from low to high, using energy Question 2 A) Endocytosis and exocytosis are forms of active transport. What is active transport? (1 point) the movement of molecules down a concentration gradient from high to low, using no energy the movement of molecules down a concentration gradient from high to low, using energy the movement of molecules up a concentration gradient from low to high, using energy the movement of molecules up a concentration gradient from low to high, using no energy Question 3 A) What does it mean for an environment to be isotonic? (1 point) The concentration of solute is greater in the environment than inside the cell. The concentration of solute in the environment is different from the concentration inside the cell. The concentration of solute in the environment and the concentration inside the cell are at equilibrium. The concentration of solute is greater inside the cell than in the environment. Question 4 A) Cells dispose of large waste molecules through a process called (1 point) endocytosis. diffusion. osmosis. exocytosis. Question 5 A) A cell is dropped into a saltwater solution and shrivels up. You infer that, compared to the cell, the type of saltwater solution is (1 point) hypotonic. tonic. hypertonic. isotonic.