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By R.H. Whittaker's Five Kingdom Classification Assertion (A) : Kingdom Protista has brought together Chlamydomonas, Chlorella (earlier placed in Algae within Plants and both having cell walls) with Paramoecium and Amoeba (which were earlier placed in the animal kingdom which lack cell wall). Reason (R) : It has put together organisms which, in earlier classifications, were placed in different kingdoms. Regarding (A) and (R)

( a ) Both A and R are correct but R is not the correct explanation for A
( b ) Both A and R are correct & R is the correct explanation for A
( c ) A is incorrect but R is correct
( d ) A is correct but R is incorrect
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(A) is the right answer.

All prokaryotic organisms were grouped together under Kingdom Monera and the unicellular eukaryotic organisms were placed in Kingdom Protista. Kingdom Protista has brought together Chlamydomonas, Chlorella (earlier placed in Algae within Plants and both having cell walls) with Paramoecium and Amoeba (which were earlier placed in the animal kingdom which lack cell wall). It has put together organisms which, in earlier classifications, were placed in different kingdoms. This happened because the criteria for classification changed.
answered Jan 3, 2014 by pady_1
 

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