Q:

A person holding a pen in his left hand sees his reflection in the mirror holding the pen in his right hand. This is due to which of the following phenomena?

A) Diffused reflection	B) Total internal reflection
C) Lateral inversion	D) Refraction

Answer & Explanation Answer: C) Lateral inversion

Explanation:

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Filed Under: Physics
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1 1500

Q:

Equal day/night in both hemispheres is on ________.

A) 21st June and 21st March	B) 5th July and 21st September
C) 21st March and 23rd September	D) 5th June and 21st September

Answer & Explanation Answer: C) 21st March and 23rd September

Explanation:

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Filed Under: General Science
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2 1500

Q:

The hormone that helps plants respond to drought is

A) abscisic acid	B) cytokinin
C) gibberellin	D) ethylene

Answer & Explanation Answer: A) abscisic acid

Explanation:

During drought, plants would be in scarcity for water. For ensuring the mineral loss of water through stomata, the plant starts to produce abscisic acid.

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Filed Under: Biology
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Q:

Fishes have a ........ chambered heart.

A) Single	B) Three
C) Four	D) Two

Answer & Explanation Answer: D) Two

Explanation:

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Filed Under: Biology
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Q:

Which one of the following tissues is responsible for increase of girth in the stem of a plant?

A) Tracheid	B) Pericycle
C) Intercalary meristem	D) Lateral meristem

Answer & Explanation Answer: D) Lateral meristem

Explanation:

In vascular plants, the lateral meristem is one of two meristems in which growth occurs in order to increase stem girth. A meristem is the region of plant tissue found on the tips of roots and shoots. It is where cell division occurs to produce new growth.

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Filed Under: Biology
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Q:

Which component in tobacco makes it harmful for human consumption?

A) Morphine	B) Nicotine
C) Heroin	D) None of these

Answer & Explanation Answer: B) Nicotine

Explanation:

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Filed Under: Biology
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Q:

Alveoli are balloon like structures within the ______.

A) lungs	B) kidney
C) liver	D) heart

Answer & Explanation Answer: A) lungs

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Filed Under: Biology
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Q:

If price of an article decreases from Rs P1 to Rs 190, when quantity demanded increases from 5000 units to 5200 units, and if point elasticity of demand is -0.8 find P1?

A) Rs 220	B) Rs 240
C) Rs 200	D) Rs 250

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