Q:

What is organic matter in soil is also called

A) residue	B) humus
C) occlusion	D) compact

Answer & Explanation Answer: B) humus

Explanation:

In soil, organic matter consists of plant and animal material that is in the process of decomposing. When it has fully decomposed it is called humus. Soil organic matter serves as a reservoir of nutrients for crops, provides soil aggregation, increases nutrient exchange, retains moisture, reduces compaction,...

This humus is important for soil structure because it holds individual mineral particles together in clusters.

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Q:

What is the full form of the Indian Political Party "CPIM"?

A) Common Party of India (Marxist)	B) Common Party of India (Movement)
C) Communist Party of India (Movement)	D) Communist Party of India (Marxist)

Answer & Explanation Answer: D) Communist Party of India (Marxist)

Explanation:

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Q:

Which of the following bacterium causes crown gall disease in plants?

A) Bacillus thurigiensis	B) Agrobacterium tumefaciens
C) Pseudomonas fluorescens	D) None of these

Answer & Explanation Answer: B) Agrobacterium tumefaciens

Explanation:

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Q:

The amount of blood filtered together by both the kidneys in a 70 kg adult male human in a minute is

A) 1100 ml	B) 100 ml
C) 1500 ml	D) 500 ml

Answer & Explanation Answer: A) 1100 ml

Explanation:

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Q:

Which of the following elements has the lowest melting point?

A) Sodium	B) Tin
C) Radon	D) Radium

Answer & Explanation Answer: C) Radon

Explanation:

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Q:

What is the net charge on Calcium fluoride?

A) 1+	B) 0
C) 1-	D) 2-

Answer & Explanation Answer: B) 0

Explanation:

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Q:

In which of the following market forms a firm does not exercise control over price?

A) Mixed Competition	B) Monopoly
C) Oligopoly	D) Perfect Competition

Answer & Explanation Answer: D) Perfect Competition

Explanation:

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Q:

What is the duration (in minutes) of one-half of a football match?

A) 30	B) 35
C) 40	D) 45

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