A and C is the answer for your question and yes I did some calculations
Ok so five times five is twenty five
Semipermeable means only certain substances can pass through. I imagine you are talking about cell membranes which are semipermeable. This means vital things like oxygen and nutrients are able to pass through the membrane, while not allowing everything to enter the cell
B. community
hope this helps;)
What are high level factors that you would need to measure to inspect improvement in a functioning ecosystem? are drastic climate changes more crucial to an ecosystem than a change in magnitude?