Write the grades of body organisation as per evolutionary sequence.
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Answer:
Grades of Body Organization as per Evolutionary Sequence
Explanation:
Now I believe I do understand the question and here we are speaking of the Hierarchy of the life. This is also termed as the level of organization or Biological classification.
It refers to the classification or Hierarchy of the organisms that are complex in form for structures. In general, so any evolution on this planet, the basic unit begins with what is termed as the atom. Within the Hierarchy, this later on extends till the Biosphere. Within this scheme, at the higher level is what we can call as the Ecological Organization.
There are different levels within this scheme and with each increase it gets complex. There are a number of functions and properties that are dominant in the higher levels but may be absent in the lower levels.
So here the grades or Hierarchy can be mentioned as below.
At the Acellular level or at the precellular level it begins with Atom. Then two or more atoms combine to form the Molecule. A group of similar or different molecules combine to form the Biomolecular complex.
Next it comes to the Sub-cellular level where the groups of biomolecules together form the Organelle. At the cellular level this is what forms the single cell – which is also considered as the Unit of all life forms.
More than one type of cells will together combine to form the Tissue. So tissues are the cell groups that are functional. This is at the Multicellular and Supercellular levels.
More than one tissue combines together to form and perform a single function. These form the Organ. All different types of organs that combine and function together form the organ system. There may be more than one organ within a single organ system in the organism.
Different types of organ systems function within a specific organ body and form the individual. This is termed as the population within the same type of species.
Different types of species within the same region forms what is termed as the community. Here in a single community we may have groups that are inter-species type.
Together more than types of community together come to form what is termed as the Eco system. These are all types of organisms that belong to the biological domains including the Biotic and Abiotic environment.
Different types of ecosystem within a region will combine to form the Biome, this is generally at the continental scale. So all life forms on the planet forms what is termed as the Biosphere. It is also called as the ecosphere.