What is the difference between osmosis & diffusion? What are the TWO types of active transport?

What are the TWO types of passive transport?

Substances can only move into or out of a cell if the cell membrane is .

In diffusion, particles move from an area of higher concentration to one of lower concentration until equilibrium is reached. In osmosis, a semipermeable membrane is present, so only the solvent molecules are free to move to equalize concentration.

Simple Diffusion and osmosis are both forms of passive transport and require none of the cell's ATP energy.

Active Transport.

Those proteins do much of the work in active transport. They are positioned to cross the membrane so one part is on the inside of the cell and one part is on the outside. Only when they cross the bilayer are they able to move molecules and ions in and out of the cell.

hope I help! sorry if Im wrong.

Im not sure in the last question.

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

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the real answer is b. scintillation counter