Genes.
A gene is a section of a DNA molecule that contains the information to code for one specific protein. The gene contains the code that determines the structure of a protein.
Answer:
An ecosystem is made up of all the living animals and plants and the non-living matter in a particular place, like a forest or lake. The idea of the web of life is shown by the interdependence within an ecosystem. ... Animals and plants depend on a complex system of food for survival.