Explanation

Joseph F. Glidden was born in New York on Jan. 18, 1812.

He invented barbed wire in 1873 and was granted the patent on Nov. 24, 1874.

Gidden  known as the "Father of Barbed Wire".

Explanation

The annual number of live births per 1,000 people is called the Crude Birth rate

ہر ایک ہزار افراد کی سالانہ پیدائش کی شرح کو خام پیدائش کی شرح کہا جاتا ہے۔

the annual number of deaths per 1,000 people is called the Crude death rate

ہر ایک ہزار افراد کی سالانہ اموات کو خام اموات کی شرح کہا جاتا ہے۔

Explanation

The atmospheric pressure at any place is measured by a Barometer

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The barometer was invented by Evangelista in 1644.

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Explanation

Euclid, also known as  Euclid of Alexandria , was a Greek mathematician, often referred to as the "founder of geometry" or the "father of geometry".

Explanation

QSO 1984 replaced with the Indian Evidence Act 1872

Explanation

A mango tree is an example of Autotroph.

Autotrophs are organisms that make their own food. 

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Explanation

Lettuce is an annual plant of the daisy family, Asteraceae. 

Explanation

Titan is the name of the largest moon of Saturn

Explanation

The equator receives the most direct sunlight because sunlight arrives at a perpendicular (90 degrees) angle to the Earth.

Explanation

The amount of water vapor in the air is called absolute humidity.

The amount of water vapor in the air as compared with the amount of water that the air could hold is called relative humidity.