Level Biological Organization:
Biological organization is not simple. It has high degree of complexity because of which the living organisms are able to carry out a number of processes (some very complicated), which distinguish them from the non-living things. Each living being is a self-controlled structural and functional integrity. Biological organization can be divided into the following levels.
SUBATOMICAND ATOMICLEVELS:
ATOM:
All living and nonliving matter are formed of simple units called atoms which literally mean something that cannot be cut (a= without, tom = cut).
ELEMENTS:
The living substance is formed of a large number of elements. These can be classified into three groups.
Major Elements:
These elements occur in large quantities e.g. Hydrogen, carbon, nitrogen and oxygen are the major elements.
Minor Elements:
These are required in relatively small quantities e.g. Sulphur, Phosphorus etc. are minor elements.
Trace Elements:
These are required only in very small quantities or in traces. The list of trace elements is a long onc and it is still expanding. Tin, vanadium, nickel, fluorine, silicon, cobalt, copper, zinc, magnesium selenium, chromium, molybdenum, cadmium are trace elements.
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