Question

question 8
to keep a stable environment, also known as keeping they must have control on what goes in and out. the helps regulate. the (some words may repeat)
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question 9
small non - polar molecules are able to go through the cell membrane. they move through by simple diffusion. examples of these molecules include. and it does not take any energy and is passive transport and moves from high to a low concentration.
a water and amino acids
b carbon dioxide and glucose
c water and oxygen
d carbon dioxide and oxygen

Explanation:

Small non-polar molecules like carbon dioxide and oxygen diffuse through the cell membrane via simple diffusion. Water (polar) uses aquaporins, amino acids/glucose (polar/large) require facilitated transport.

Answer:

d. carbon dioxide and oxygen