Home Biology Biological Classification NCERT Assertion: The presence of chlorophyll in eu…
Biology Biological Classification NCERT Single Correct MCQ
Published on: August 13, 2026

Assertion: The presence of chlorophyll in euglena shows its plant like structure.

Reason: Euglena cannot be classified on the basis of two kingdom classification.

A
Both Assertion and Reason are true and Reason is correct explanation of Assertion.
B
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
C
Assertion is true, but Reason is false.
D
Assertion is false, but Reason is true.

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Text Solution

Verified by Experts
The correct answer is:
B

Assertion is True: Euglena contains chlorophyll and can perform photosynthesis like plants. This autotrophic ability is considered a plant-like feature.

Reason is True: Euglena exhibits both plant-like (chlorophyll, autotrophy) and animal-like (no cell wall, flagellar movement, heterotrophy in the dark) characteristics. Because it possesses traits of both, it could not be easily classified within the rigid two-kingdom system (which only included Plantae and Animalia) and was later placed in the Kingdom Protista.

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