Questions

Q:

Which of these is unique to flowering plants?

A) double fertilization B) an embryo surrounded by nutritive tissue
C) haploid gametophytes D) pollen production
 
Answer & Explanation Answer: A) double fertilization

Explanation:

In flowering plants one sperm nucleus fertilizes the egg and the other sperm nucleus fuses with two other nuclei found within the ovule, thus forming triploid endosperm.

 

Hence, double fertilization is unique to flowering plants.

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Filed Under: Biology
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Q:

The atoms of the elements having same mass number but different atomic number are called

A) Isotopes B) Isobars
C) Isotones D) Isomers
 
Answer & Explanation Answer: B) Isobars

Explanation:
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Q:

What treat was invented by 11-year-old Frank Epperson in 1905?

A) Popsicle B) Banana split
C) Cotton candy D) Cracker Jacks
 
Answer & Explanation Answer: A) Popsicle

Explanation:
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Q:

The 2017 World Hydrography Day (WHD) is observed on which date  ?

A) June 23 B) June 22
C) June 21 D) June 20
 
Answer & Explanation Answer: C) June 21

Explanation:

The World Hydrography Day (WHD) is observed every year on June 21 to publicise the work of hydrographers and to create awareness about hydrography which is an essential science before undertaking any activity on or under the sea. The 2017 theme is “Mapping our seas, oceans and waterways – more important than ever”.

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Q:

Which region specializes in diamonds?

A) Sub-Saharan Africa B) Central america
C) Middle east Europe D) South America
 
Answer & Explanation Answer: A) Sub-Saharan Africa

Explanation:
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Q:

What is refractive index ?

A) it is defined as the ratio of speed of light in the medium to the speed of light in vacuum. B) it is defined as the product of speed of light in medium and in vacuum.
C) it is defined as the ratio of speed of light in vacuum to the speed of light in the medium . D) None of above
 
Answer & Explanation Answer: C) it is defined as the ratio of speed of light in vacuum to the speed of light in the medium .

Explanation:
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Filed Under: Physics

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Q:

Which of the following rulers was held captives by his son ?

A) Babar B) Humayun
C) Akbar D) Shajahan
 
Answer & Explanation Answer: D) Shajahan

Explanation:
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Q:

Which of the following gases is present under pressure in soft drinks?

A) Nitrous oxide B) Oxygen
C) Nitrogen D) Carbon dioxide
 
Answer & Explanation Answer: D) Carbon dioxide

Explanation:

Carbon dioxide is present under pressure in soft drinks.

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Filed Under: Chemistry
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