Explanation

Explanation

Blood circulation rate in human arteries varies, fastest in the aorta (around 30-40 cm/s) 

In capillaries, the speed drops significantly to allow nutrient and gas exchange.

Blood velocity is highest in arteries, moderate in veins, and slowest in capillaries.

Proper circulation speed ensures efficient delivery of oxygen and nutrients throughout the body.

Explanation

Chromosomes are thread-like structures found in the nucleus of a cell.

They carry genetic information in the form of DNA.

Humans have 46 chromosomes (23 pairs) in each cell.

Chromosomes determine hereditary traits passed from parents to offspring.

They play a key role in cell division, growth, and reproduction.

Explanation

Bile is produced by the liver but stored in the gall bladder.

The gallbladder releases bile into the small intestine when fatty foods are present.

Bile helps in the digestion and absorption of fats.

It also neutralizes stomach acid entering the small intestine.

Gall bladder function is crucial for efficient fat metabolism in the body

Explanation

Metalloids have properties of both metals and non-metals.

They can conduct electricity better than non-metals but worse than metals.

Examples include silicon, boron, and germanium.

Metalloids are widely used in semiconductors and electronics.

Their mixed properties make them important in modern technology.

Explanation

Explanation

The area known as the world's earthquake belt is the Circum-Pacific Belt.

Popularly called the Ring of Fire,

It is a horseshoe-shaped zone around the Pacific Ocean

Where about 90% of Earth's earthquakes and most volcanic activity occur due to intense tectonic plate movement

Explanation

An oasis is a fertile area found in a desert.

It has a natural source of water, such as springs or underground water.

The presence of water allows plants and trees to grow.

Oases often support human settlements and agriculture.

They are crucial resting points for travelers and caravans in deserts.

Explanation

The Sun's diameter is approximately 1.4 million kilometers (864,000 miles)

Making it about 109 times wider than Earth, 

A massive size that dominates our solar system as a giant ball of hot hydrogen and helium. 

Explanation

The term is Continental Drift.

It was proposed by Alfred Wegener.

It explains that continents were once joined together and later moved apart.

This movement occurs over millions of years.

Continental drift helped lead to the modern theory of plate tectonics.