Why are enzymes needed in the body?

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?