Explanation

Alexander Graham Bell is often credited with being the inventor of the telephone since he was awarded the first successful patent. 

Telephone was invented in 1876.

Graham Bell made the first-ever telephone call to his partner, Thomas Watson.

Explanation

Penicillin was discovered by Alexander Flaming In 1928.

Penicillin was the first true antibiotic.

The first patient Albert Alexander, a 43-year-old policeman, was treated with penicillin on 12 February 1941.

Alexander Flaming determined that penicillin had an antibacterial effect and published his findings in 1929.

Explanation

Group O can donate red blood cells to anybody.

It's the universal donor.

Group kind O negative blood is occasionally called the generic blood donor type.

Only 7% of the population is O negative.

 ND23-4-2023

Explanation

Manchhar Lake is located: in the Jamshoro district of Sindh

Manchar Lake is the largest natural lake in Pakistan

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Manchar Lake is the largest lake in Pakistan and also in South Asia.

Location: District Jamshoro

Manchar Lake covered area: 260 square KM (100 square miles)

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ND02-12-2022

Explanation

Hydrogen is the most abundant element in the universe.

it is about 75 percent of its normal matter and was created in the Big Bang.

Additional information:

Oxygen is the most abundant element in the earth`s crust.

Calcium is the most abundant mineral in the human body.

Explanation

The human body typically has 206 bones

At the time of birth, there are 270 bones which fuse with time to come to a total of 206 bones.

The total bones of our body can be divided into:

• the axial skeleton (80) 
• the appendicular skeleton (126)

The newborn child has 300 bones.

Longest bone: Femur (thigh bone)

Shortest: Stapes (one of the 3 small bones inside the ear)

The human head has 22 bones.

Explanation

A normal human body temperature of 98.6°F corresponds to 37°C

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Additional information:

The body temperature also varies by person, age, activity, and time of day.

The Hypothalamus gland controls the temperature of the human body

A temperature over 100.4°F (38°C) most often means you have a fever caused by an infection or illness.

Explanation

Most abundant element in Earth crust is Oxygen.

Oxygen in the crust is (46.1%).

The chemical formula of oxygen (dioxygen) is O2.

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List of 10 Most Abundant Elements in the Earth's Crust

Explanation

The stratospheric ozone layer is Earth's “sunscreen”  protecting living things from too much ultraviolet radiation from the sun.

Oxygen layer in the atmosphere

Ozone protects us from the harmful ultraviolet radiation of the sun.

Ozone formula: O3

The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth's surface, in the stratosphere.

The ozone layer is depleting: Air pollution

Explanation

Carbon dioxide (CO₂) is commonly used in fire extinguishers because it helps to displace oxygen and smother the fire, preventing it from spreading.

It is particularly effective for electrical fires and fires involving flammable liquids.