What makes a greenhouse gas different than other gasses in the atmosphere? * Greenhouse gasses are always man-made.
Greenhouse gasses absorb heat radiating from the Earth's surface.
Greenhouse gasses are radioactive.
Greenhouse gasses have a green color when light shines through them.
Greenhouse gasses are poisonous to most life.

Greenhouse gasses absorb heat radiating from the Earth's surface

Explanation:

Greenhouse gases are more complex than other gas molecules in the atmosphere, with a structure that can absorb heat. They radiate the heat back to the Earth's surface, to another greenhouse gas molecule, or out to space.

passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

so, according to what that says, i believe it's hypertonic and hypotonic.

good luck!