Question

track the changes in method of animal classification how the method of animal classification changed over the time

Answer 1

At the starting of the classsification animals were classified on the basis of their size but after Robert Whittaker presented the five kingdom classification animals were classified on the basis of -

1)basis of cell organisation-cellular or tissue level

2)presence of ceolem- absent,pseudo ceolom and coelomate

3)presence of notochord

4)duration of notochord
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