oct3621
oct3621 oct3621
  • 25-10-2021
  • Biology
contestada

How does a substance cross the cell membrane in diffusion?
a- flowing down the concentration gradient
b- binding to a carrier protein
c- going through a pump
d- going through a channel protein
(ck-12)

Respuesta :

wattersa
wattersa wattersa
  • 25-10-2021

Answer:

A

Explanation:

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