I'm not entirely sure, but I think it is B) the pulley.
Answer:
A
Explanation:
There are different mechanisms for transport of molecules across the cell membrane. One kind of this transport is facilitated diffusion, this is a form of passive transport, not requiring any ATP (the opposite would be active transport, where it does require ATP.
Simple diffusion does require special transport proteins, and neither does osmosis. Filtration is a technique used for sterilisation of water, where any impurities can be drawn out of the liquid
I think the answer is d ... hope this helps
<span>The meaning of a poem is often subjective, since individual readers may have a different personal reaction to the work </span><span>based on creative impulses and insights that are unique to each person</span>. The answer to your question is D. I hope this is the answer that you are looking for and it comes to your help.
