Why do the plants in an area determine the organisms that can live in tha area?

Organisms depend on other organisms and on the nonliving things in an ecosystem to meet their basic needs for food, water and protection. ... Plants use energy from the sun to produce their own food from air and water. The type of soil, amount of water and temperature range in an area determine the plants that grow there.

this protocol provides a detailed procedure for total protein extraction for western blot analysis from achieved samples following trizol isolation of rna.