Assertion :Whittaker's classification for algae was not acceptable. Reason: Whittaker grouped algae in different kingdoms.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
R.H. Whittaker proposed five kingdom classification to replace the old system of classification.
The five-kingdom classification is based on the following important criteria:
(i) Complexity of the cell structure: Prokaryotic or Eukaryotic
(ii) Complexity of the organism's body: Unicellular or Multicellular
(iii) Mode of obtaining nutrition: Autotrophs or Heterotrophs
(v) Phylogenetic relationships
In the five-kingdom classification, living beings are classified into the following five kingdoms: Monera, Protista, Fungi, Plantae, and Animalia.
Unicellular algae are kept in kingdom Protista, whereas algae-like multicellular organisms are kept in kingdom Plantae and blue-green algae are part of Monera kingdom. But similar organisms must be put together.
Hence, placing algae into different kingdoms is considered a shortcoming of the five-kingdom classification.

So, the correct answer is option A.

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