"C" Climate change, because if the past time had more hurricanes than in these times, then the weather has changed. .
Answer:
-Climate is the usual temperature, weather, humidity, wind, etc of a part of the earth. (The United States Climate is generally a cold winter and hot summer.).
-Climate change can effect an ecosystem because if an ecosystem has been used to this specific climate for years and it gets switch all the organism that have acclimated to that climate has a chance or death. (Like Global Warming, if the earth warms up from its usual temperature everywhere species will have to move and forced out of there homes. Some will even become extinct because of it.)
The purpose of the transport proteins is to protect the cell's internal environment and to keep its balance of salts, nutrients, and proteins within a range that keeps the cell and the organism alive. There are four main ways that molecules can pass through a phospholipid membrane.
