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Andrews [41]
3 years ago
8

_________ are responsible for the transport of substances down a concentration gradient during facilitated diffusion.

Biology
2 answers:
Zielflug [23.3K]3 years ago
8 0

Answer: carrier proteins

Explanation:

Liula [17]3 years ago
5 0
<span>Carrie proteins.................... sorry you have to have a minimum of 20 characters;)</span>
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