NEETBotanyBiological Classification
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Blue-green algae are classified under Kingdom Plantae because they perform oxygenic photosynthesis. Reason (R): Blue-green algae are prokaryotic organisms that lack a true nucleus and membrane-bound cell organelles. In the light of the above statements, choose the most appropriate answer from the o
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A).
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A).
- C(A) is true but (R) is false.
- D(A) is false but (R) is true.
Correct answer
D. (A) is false but (R) is true.
Step-by-step solution
Assertion (A) is false because blue-green algae (cyanobacteria) are not classified under Kingdom Plantae. In R.H. Whittaker's five-kingdom classification, the primary criterion is cell structure. All prokaryotic organisms are grouped together under Kingdom Monera, regardless of their mode of nutrition. Reason (R) is true because blue-green algae are prokaryotes. They have a primitive cellular organization lacking a well-defined nucleus and membrane-bound cell organelles. Therefore, (A) is false but (R) is true. Ans