NEETBotanyBiological Classification
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): When deprived of sunlight, euglenoids behave like heterotrophs by predating on other smaller organisms. Reason (R): The pigments of euglenoids are identical to those present in higher plants. In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not 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 but (R) is not the correct explanation of (A)
Step-by-step solution
Assertion (A) is a correct statement as euglenoids are mixotrophic; they are photosynthetic in the presence of sunlight but behave as heterotrophs when deprived of it. Reason (R) is also a correct statement according to NCERT, which states that the pigments of euglenoids are identical to those present in higher plants. However, the presence of plant-like pigments explains their ability to perform photosynthesis in sunlight, not their heterotrophic behaviour in the dark. Therefore, both (A) and (R) are correct, but