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Standard XII

Biology

Secondary Growth in Stem

Assertion :Va...

Question

Assertion :Vascular cambium is considered as lateral meristem. Reason: It gives rise to lateral shoots.

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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Assertion is incorrect but Reason is correct.

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Solution

The correct option is C Assertion is correct but Reason is incorrect.
Vascular cambium is present in between primary xylem and phloem. During secondary growth, vascular cambium forms secondary xylem and phloem which increases girth or diameter of stem and roots. Hence, vascular cambium is called as lateral meristem. Therefore, assertion is correct. However, it does not give rise to lateral shoots.
Thus, the correct answer is option C.

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Similar questions

Q. Given below are assertion and reason. Point out if both are true with reason being correct explanation (A), both true but reason is not correct explanation (B), assertion true but reason wrong (C), and both wrong (D),
Assertion. Vascular cambium is considered as lateral meristem.
Reason. It gives rise to lateral shoots.

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.

(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.

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.

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

.

Reason:

CaO

formed by decomposition of

{CaCO}_{3}

reacts with

{SiO}_{2}

to form slag.

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