Question

1. what is the difference between endocytosis and pinocytosis?
2. which gases are permeate through plasma membranes?

Explanation:

Endocytosis is a general process where cells engulf materials. Pinocytosis is a specific type of endocytosis where cells take in liquid - like substances. Gases like oxygen ($O_2$) and carbon dioxide ($CO_2$) can permeate through plasma membranes because they are small and non - polar, allowing them to pass through the lipid bilayer of the membrane.

Answer:

1. Endocytosis is a general process of cell engulfing, pinocytosis is a specific type of endocytosis.
2. Oxygen ($O_2$) and carbon dioxide ($CO_2$).