NEETBotanyBiological Classification
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Cyanobacteria are placed in Kingdom Monera despite being commonly referred to as blue-green algae. Reason (R): Cyanobacteria have chlorophyll 'a' similar to green plants but completely lack a membrane-bound nucleus and organelles. In the light of the above statements, choose the most appropriate an
Options
- ABoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- BBoth (A) and (R) are correct and (R) is the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
B. Both (A) and (R) are correct and (R) is the correct explanation of (A)
Step-by-step solution
Assertion (A) is correct because cyanobacteria are historically called blue-green algae due to their photosynthetic ability and appearance, yet they are taxonomically classified under Kingdom Monera. Reason (R) is also correct and provides the exact taxonomic justification for this classification. According to the five-kingdom classification by R.H. Whittaker, the defining feature of Kingdom Monera is prokaryotic cell organization (lack of a membrane-bound nucleus and other membrane-bound organelles). Even though c