Answer:
Classification has been
a centre piece of biology ever since Linnaeus, providing a framework on which existing
knowledge can be organized and predictions about unknown traits can be made.
But the basis of
biological classification has gone through a series of upheavals over the last3
centuries, from being considered a plan in mind of the creator, to the neutral
assessment of overall similarity, to a reflection of evolutionary niches and
finally to a phylogenetic mapping of the tree of life. e.g., in two kingdom
classification there are two groups, i.e., Plantae and Animalia.
These groups
are made on the basis of structural and cellular difference like plant possess cell
wall, central vacuole, whereas animals lack cell wall and central vacuole but
the drawback in this system classification is that eukaryotic and prokaryotic
organisms like Euglena , bacteria and fungi are not included in this kingdom
classification.
That are
later added in three kingdom classification that in (kingdom-Protista) finally
1969,Whittaker purposed five kingdom classification.
These classifications
are done on the basis of increase in understanding regarding organism by the
advancements made in scientific techniques and by observing minute detailing
that has led this classification more detailed and scientifically correct.
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