Whats the question that is the biology question
The answer is <span>b. transport proteins.
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Facilitated diffusion is the process of passive transport, which means without using of energy, of ions and molecules across a cell membrane. Although, this process does not require energy such as active transport, transport proteins are required. The role of transport proteins in facilitated diffusion is to provide a hydrophilic route within hydrophobic lipids of the membrane, and that way facilitate ions and molecules to cross the membrane.
Answer:
at the lowest part of the pyramid
Explanation:
this is due to enable continuation of the pyranid correcty
