Q:

The tree species most commonly used in social forestry is

A) Peepal	B) Gulmohar
C) Eucalyptus	D) Mango

Answer & Explanation Answer: C) Eucalyptus

Explanation:

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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:

The credit for classifying the elements on the basis of their atomic masses goes to

A) John Dalton	B) John Alexander Reina Newlands
C) Dmitri Mendeleev	D) Johann Wolfgang Dobereiner

Answer & Explanation Answer: C) Dmitri Mendeleev

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Q:

In which of the following the dominant phase is Gametophyte?

A) Bryophyta	B) Pteridophyta
C) Gymnosperms	D) Angiosperms

Answer & Explanation Answer: A) Bryophyta

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Q:

The color of human skin depends upon

A) melanin	B) carotenoids
C) anthocyanins	D) chlorophylls

Answer & Explanation Answer: A) melanin

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Q:

______ is a thyroid hormone which controls the balance of calcium in the body.

A) Calcitonin	B) Thyroxine
C) Calmodulin	D) all of these

Answer & Explanation Answer: A) Calcitonin

Explanation:

Calcitonin is 32-amino acid linear polypeptide hormone that is produced in humans primarily by the parafollicular cells of the thyroid, and in many other animals in the ultimopharyngeal body. It acts to reduce blood calcium, opposing the effects of parathyroid hormone.

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Q:

What was the element used in traditional thermometers which is highly toxic in nature?

A) Carbon	B) Mercury
C) Arsenic	D) Cadmium

Answer & Explanation Answer: B) Mercury

Explanation:

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Q:

P. V. Sindhu defeated Wang Yihan to enter the semi final of womens' singles of badminton at the Rio Olympics. Wang Yihan belongs to ____________

A) Indonesia	B) Taiwan
C) China	D) Japan

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