Assertion :In tropical rain forests, O-horizon and A-horizon of soil profile are shallow and nutrient-poor. Reason: Excessive growth of micro-organisms in the soil depletes its organic content.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

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

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Assertion is correct but Reason is incorrect.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Both Assertion and Reason are incorrect.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C Assertion is correct but Reason is incorrect.
O-horizon and A- horizon are the top layers of soil. For plant growth, top soil is most important. In tropical rain forests, there is rapid decomposition of these top soil layers i.e. O-horizon and A-horizon, due to which fertile soil layers are unable to accumulate. Thus, O-horizon and A-horizon of soil profile are shallow and nutrient-poor. Hence assertion is correct.
The organic content of the top soil layers deplete due to rapid decomposition not due to excessive growth of microorganisms. Hence reason is incorrect.
So, the correct answer is 'Assertion is correct but Reason is incorrect'.

Suggest Corrections

Similar questions

Q. Assertion :In tropical rain forests, O horizon and A horizon of soil profile are shallow and nutrient-poor. Reason: Excessive growth of micro-organisms in the soil depletes its organic content.

Q. Assertion :

In tropical rainforest O horizon and A horizon of soil profile are shallow and nutrient poor

Reason: Excessive growth of micro organism in soil depletes its organic content

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) 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.

Join BYJU'S Learning Program