Consider the following organisms: Agaricus Nostoc Spirogyra Which of the above is/are used as biofertilizer/biofertilizers?

Consider the following organisms:

Agaricus
Nostoc
Spirogyra

Which of the above is/are used as biofertilizer/biofertilizers?

[UPSC Civil Services Exam – 2013 Prelims]

(a) 1 and 2

(b) 2 only

(c) 2 and 3

(d) 3 only

Answer: (b)

Explanation:

Option 2 is the correct answer because Nostoc, a type of free-living bacteria, has the ability to fix atmospheric nitrogen into a form that is beneficial for plant growth.
This makes it a potential sustainable biofertilizer, unlike Spirogyra which is not commonly used for this purpose and can even compete with plants if introduced into the soil.
Agaricus, on the other hand, is a mushroom species that is known for its edible varieties.

Which one of the following Schedules of the Constitution of India contains provisions regarding anti-defection?

The provisions in Fifth Schedule and Sixth Schedule in the Constitution of India are made in order to

The provisions in Fifth Schedule and Sixth Schedule in the Constitution of India are made in order to [UPSC Civil Services Exam – 2015 Prelims]

Consider the following statements: The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:

Consider the following statements: The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:

Under which Schedule of the Constitution of India can the transfer of tribal land to private parties for mining be declared null and void?

Under which Schedule of the Constitution of India can the transfer of tribal land to private parties for mining be declared null and void? [UPSC

The Ninth Schedule was introduced in the Constitution of India during the prime ministership of

The Ninth Schedule was introduced in the Constitution of India during the prime ministership of [UPSC Civil Services Exam – 2019 Prelims] (a) Jawaharlal Nehru

Categories

Which one of the following Schedules of the Constitution of India contains provisions regarding anti-defection?

The provisions in Fifth Schedule and Sixth Schedule in the Constitution of India are made in order to

Under which Schedule of the Constitution of India can the transfer of tribal land to private parties for mining be declared null and void?

The Ninth Schedule was introduced in the Constitution of India during the prime ministership of

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Categories

Which one of the following Schedules of the Constitution of India contains provisions regarding anti-defection?

The provisions in Fifth Schedule and Sixth Schedule in the Constitution of India are made in order to

Under which Schedule of the Constitution of India can the transfer of tribal land to private parties for mining be declared null and void?

The Ninth Schedule was introduced in the Constitution of India during the prime ministership of

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