c. It never changes during the experiment.
The gene pool. This is the series and combinations of genes in the environment. This can affect the human adaption of the environment and how they cope up with the species living with them. They interact with them in a way that the species can affect one another,
In facilitated diffusion, substances move into or out of cells down their concentration gradient through protein channels in the cell membrane. Simple diffusion and facilitated diffusion are similar in that both involve movement down the concentration gradient.
I would believe it is the Ozone but since it’s not an option the Ferrel Cell is the westerlies and the polar cell is the polar easterlies. So, I would say go with 4! Hope this helps, goodluck! xoxo.
