Answer:
that means they are not a prey to any animal
<span>B) anaerobic respiration</span>
I may be wrong but maybe oil
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.