How is sunlight important to most ecosystems

What does it mean for a cell membrane to be selectively permable

What is the primary goal of human communities?

Which of the following is most likely the result of an organism having lipids in its body a) water cannot be absorbed through the surface of a leaf b)human eats fruits to get a quick source of energy c) a sheep sleeps for more hours in the winter d) a warm river is filled with fish and algae