Explanation

Explanation

The word "atom" comes from the Greek word "atomos," meaning "indivisible."

It was coined by ancient Greek philosopher Democritus to describe the smallest, indivisible particles that make up matter.

Explanation

On November 3, 1957, the Soviet Union sent a dog named Laika into space aboard Sputnik 2.

Laika became the first living being to orbit the Earth, though tragically, she did not survive the mission.

Explanation

A geostationary satellite orbits the Earth once every 24 hours, matching the Earth's rotation.

This keeps it fixed over the same spot on the equator, making it ideal for communication and weather monitoring.

Explanation

Sulphur is widely used in the chemical industry, especially in making explosives like gunpowder.

It is also used in producing sulfuric acid, which is a key industrial chemical.

Explanation

Natural gas is a key feedstock for fertilizer production.

Approximately 29% of the country's natural gas consumption is utilized in the manufacture of fertilizers.

Explanation

The breakdown of proteins results in the production of ammonia, which is then converted into urea in the liver.

Urea is excreted from the body through the kidneys in the urine.

Explanation

The ureter transports urine from the kidneys to the urinary bladder.

The urinary bladder stores urine until it is ready to be expelled from the body.

Explanation

Cell wall is not a part of animal cells; it is found only in plant, fungal, and bacterial cells.

Animal cells have a cell membrane, cytoplasm, and vacuole (though smaller than in plant cells).

Explanation

• Self-Pollination is the transfer of mature pollen grains from the anther of one flower to the stigma of the same flower or another flower of the same plant.
• This means that the pollen is transferred within the same plant, allowing for fertilization to occur without the involvement of another plant.