Biological process

Biology is the science that deals with living things. In general:
Many things that appear to be one organism are in fact several living together. An example is lichen. Lichen is a symbiosis between a blue-green algae and fungi. Organisms that live together may not reproduce together, but their life processes are bound up together. They help each other to live.
Modern ideas.
Modern ideas from molecular biology, cell biology and cybernetics give us more ways of describing biological processes.
Cells and macro-molecules.
All life processes on Earth use the chemistry of carbon compounds. In particular, all life uses long-chain molecules such as proteins and nucleic acid. With water, which is essential, the long molecules are wrapped inside membranes to form cells. This is true of all known life.
Systems theory.
Living organisms are open systems. The main idea is that the processes serve to keep them alive by homeostasis. They are always changing, but always staying within certain limits as long as they live. 
They do this by exchanging materials and information with their environment. They undergo metabolism, maintain homeostasis, possess a capacity to grow, respond to stimuli and reproduce. All of this preserves the individual and its race or species.