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Q:

A passage is given with 5 questions following it. Read the passage carefully and choose the best answer to each question out of the four alternatives.


The quest to find life outside the solar system got a big boost with the discovery of seven Earth-size extra-solar planets, or exoplanets, orbiting a dwarf star about 40 light years away. Unlike earlier discoveries of exoplanets, all seven planets could possibly have liquid water — a key to life as we know it on Earth — with three planets having the greatest chance. This is by far the largest collection of Earth-like planets in the habitable 'Goldilocks' zone of a star — neither too close nor too far from a star, which raises the possibility of liquid water being present on the surface. Only Earth has liquid water in the solar system. Since the dwarf star is much cooler than the Sun, the dimming of light each time a planet passes or transits before the star could be easily recorded from Earth unlike in cases when planets transit a Sun-like bright star. Since the initial discovery of three planets was made using the Chile-based Transiting Planets and Planetesimals Small Telescope, the exoplanet system is called TRAPPIST-1.

 

How many planets in our solar system have liquid water?

A) Two B) Three
C) One D) Four
 
Answer & Explanation Answer: C) One

Explanation:
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Q:

When some goods or productive factors are completely fixed in amount, regardless of price, the supply curve is

A) horizontal B) downward sloping to the right
C) vertical D) upward sloping to the right
 
Answer & Explanation Answer: D) upward sloping to the right

Explanation:

Although demand curves are typically downward sloping to reflect that consumers’ utility for a good diminishes with increased consumption, firm supply curves are generally upward sloping.The upward sloping character reflects that firms will be willing to increase production in response to a higher market price because the higher price may make additional production profitable.

 

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Q:

The mammalian heart is myogenic and it is regulated by nerves. The heartbeat originates from

A) sinoatrial node B) QRS wave
C) T wave D) hepatic portal system
 
Answer & Explanation Answer: C) T wave

Explanation:

The mammalian heartis called myogenic (myo = muscle, genie = originating from). It means the heart beat or the activities of the heart are auto regulated which originates from a muscle called nodal tissue.In the human heart,heartbeat originates and contraction is initiated by a special modified heart muscle known as sinoatrial node. It is located in the right atrium; while the QRS waves are the depolarisation of the ventricles, which initiates the ventricular contraction.The T-wave represents the repolarisation,that is, the return of the ventricles from excited tonormal state.Hepatic portal system is the unique vascular connection that exists between the digestive tract and liver. This vein carries blood from intestine to the liver.

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Q:

Dakshayani, which is in news recently, is a/an

A) Plant B) Animal
C) River D) Train
 
Answer & Explanation Answer: B) Animal

Explanation:

Dakshayani, which is in news recently, is an Animal (She - elephant).

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Q:

The unit for measuring electric power is the

A) Steridian B) Watts
C) Watts D) Volts
 
Answer & Explanation Answer: C) Watts

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Q:

What year was the first Oscar Awards ceremony held?

A) 1945 B) 1929
C) 1931 D) 1954
 
Answer & Explanation Answer: B) 1929

Explanation:
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Q:

Who developed the idea of Crop Rotation?

A) Charles Townshend B) Swede Svenson
C) Potato Peterson D) Cabbage Carlson
 
Answer & Explanation Answer: A) Charles Townshend

Explanation:

Crop Rotation is the practice of growing a series of dissimilar or different types of crops in the same area in sequenced seasons. It is done so that the soil of farms is not used for only one set of nutrients. It helps in reducing soil erosion and increases soil fertility and crop yield. The British agriculturist Charles Townshend (1674–1738) popularised this revolutionary technique in the 18th century.

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Q:

Which Governor-General prohibited practice of 'Sati' in 1829?

A) Sir George Barlow B) Lord William Bentinck
C) Warren Hastings D) Lord Minto
 
Answer & Explanation Answer: B) Lord William Bentinck

Explanation:

Lord William Bentinck was the Governor-General who prohibited practice of 'Sati' in the year 1829.

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