Assertion :Euglena is studied as an animal as well as a plant. Reason: Euglena is autotrophic and heterotrophic both.

Both assertion and reason are correct and reason is the correct explanation for assertion.

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Both assertion and Reason are correct but reason is not the correct explanation for assertion.

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Assertion is correct but reason is incorrect.

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Both assertion and reason are incorrect.

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Solution

The correct option is A Both assertion and reason are correct and reason is the correct explanation for assertion.
Euglena belongs to class Protista. It is considered as plant and animal both because it is autotrophic when sunlight is present but turns heterotrophic under the unfavourable condition when the sunlight is not there. Euglena chloroplasts contain pyrenoids, used in the synthesis of paramylon, a form of starch energy storage enabling Euglena to survive periods of light deprivation.

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Similar questions

Q. Given below is an assertion and reason.
A. Both assertion and reason are true and reason is the correct explanation
B. Both assertion and reason are true but reason is not the correct explanation
C. Assertion is true, but reason is wrong
D. Both assertion and reason are wrong

Assertion: Euglena has chlorophyll, a feature similar to plants.
Reason: Euglena cannot be classified on the basis of two kingdom classification.

Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

Assertion (A) Order and molecularity are same.

Reason (R) Order is determined experimentally and molecularity is the sum of the stoichimetric coeffcient of rate determining elementary step.

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