¿Qué diferencia hay entre la membrana plasmática de una célula animal y una célula vegetal?

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water

Which of the following locations would most likely have the most wind erosion?