Climate change due to the greenhouse effect.
Selective permeability is the cell wall being particular about what they let in and out of the cell. It is important because if the cell just let any old molecule inside, it would be letting potentially harmful things in.
Answer:
A. <em>provide</em><em> </em><em>structure</em><em> </em><em>and </em><em>protection</em><em> </em>
<em>hope</em><em> it</em><em> helps</em>
Answer: B
Explanation: A smaller horse would be needed to pull around kids.A skinny horse would be needed to run long distances.
Answer:
because it is moving Na+ against its concentration gradient