Answer:
My guess would be H₂O/ water, since osmosis is a form of passive transport and I can't see the model the question references. Gases like O₂/ oxygen, CO₂/ carbon dioxide, and simple sugars like glucose can also pass through a cell membrane with passive transport though.
Answer: B. Osmosis Across a Membrane
The movement of water across a gradient is called osmosis.
It should be a short-day plant because it grows in the winter.
