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Standard XII
Biology
Question

Assertion :Whittaker's classification for algae was not acceptable. Reason: Whittaker grouped algae in different kingdoms.
  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
  3. Assertion is correct but Reason is incorrect.
  4. Both Assertion and Reason are incorrect.

A
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
B
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
C
Assertion is correct but Reason is incorrect.
D
Both Assertion and Reason are incorrect.
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Solution
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  • 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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