proteins or channel proteins are used to aid substances across the cell membrane in passive transport

channel proteins

Explanation:

Water channel proteins (aquaporins) allow water to diffuse across the membrane at a very fast rate. Ion channel proteins allow ions to diffuse across the membrane. A gated channel protein is a transport protein that opens a "gate," allowing a molecule to pass through the membrane.

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hi! do you know the answer for this flvs question?

what do anaerobic organisms have in common with photosynthetic organisms?

they both appeared on earth at about the same time.

they both can only exist as single-celled organisms.

they both need an energy source in order to survive.

they both produce carbon dioxide as a waste product.

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