Explanation

A compound sentence contains at least two independent clauses. 

These two independent clauses can be combined with a comma and a coordinating conjunction or with a semicolon.

Explanation

The moon's surface is covered with a layer of fine dust called regolith.

This layer consists of tiny fragments of rock and mineral particles created by meteorite impacts.

Explanation

The pigment responsible for the red color inside a watermelon is lycopene.

Lycopene is also found in tomatoes and other red fruits and vegetables.

Explanation

Robert Koch is famous for his work on tuberculosis.

He identified the bacterium Mycobacterium tuberculosis as the cause of the disease.

Explanation

In 1992, the membership of the Economic Cooperation Organization (ECO) increased from 3 to 10.

This expansion marked a significant growth in the organization’s regional cooperation and influence.

Explanation

The antibiotic substance "penicillin" was discovered by Alexander Fleming, a Scottish scientist.

In 1928, he noticed that a mold called Penicillium notatum had antibacterial properties.

This leading to the development of penicillin as a crucial antibiotic.

Explanation

Shanghai Cooperation Organization (SCO) is the largest regional organization in terms of population and geographic scope.

It covers a vast area of Eurasia.

It includes over 40% of the world's population.

This making it the most expansive in both dimensions.

Explanation

Kauromal Chandanmal Khilnani was the first to produce literary essays in Sindhi.

 Kauromal's well known works are Ratnavali (1888), Aryanari-carita (1905) and Radharani (1914).

Explanation

The first Chairman of SAARC (South Asian Association for Regional Cooperation) was General Hussain Muhammad Ershad of Bangladesh.

He served as the Chairman during the organization's inaugural session in 1985.

Explanation

Continetal Drift theory was proposed by Alfred wegner in 1912.

It stated that continents have changed their position and initially there was only one big continent named Pangea.

Although he was unable to explain the force behind the drifting of continents.