<span>It was a crossroads for trade.
Hope this helped! :)
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"Nowadays parents have lots of choices for their children's healthcare." That sentence is not written using academic voice.
Answer:
Facilitated diffusion
Explanation:
Facilitated diffusion is a kind of passive transport. Although facilitated diffusion consists of the transportation of proteins, it still represents a passive transport due to the fact that the solute is advancing in the gradient of concentration. Little molecules that are non-polar have great facility to diffuse through the cell membrane.
Umm I'm not too sure what you're asking here. Try to rephrase it and add the other options. It may not be the first one.