Explanation

Explanation

Centrioles play a crucial role in organizing the spindle fibers during cell division, specifically in mitosis and meiosis.

They help in the formation of the spindle apparatus, ensuring proper chromosome separation.

Explanation

In a regular hexagon, all interior angles are equal. The sum of the interior angles of a hexagon is:

(6 - 2) × 180° = 720°

Since there are 6 equal angles:

Each angle = 720° / 6

Each angle = 120°

Explanation

The proverb "A rolling stone gathers no moss".

It means that a person who is always moving or changing jobs does not settle down

As a result, avoids responsibilities or long-term commitments.

Explanation

• In the human heart, blood returning from the lungs via the pulmonary veins drains into the left atrium.
• From there, it flows through the mitral valve into the left ventricle, which pumps it out to the rest of the body through the aorta.

Explanation

جملہ "امتحان دیا گیا" میں کام کرنے والے (فاعل) کا ذکر نہیں، بلکہ کام (امتحان دیا جانا) پر زور دیا گیا ہے۔

ایسے جملے فعل مجہول کہلاتے ہیں کیونکہ ان میں کام کرنے والے کا ذکر نہیں ہوتا۔

Explanation

An ocean current is a continuous, directed movement of seawater.

Ocean current is generated by:

• A number of forces acting upon the water including wind
• The Coriolis effect
• Breaking waves
• Cabbeling
• Temperature and salinity differences.

Additional Information:

Ocean floods:

Coastal flooding occurs when dry and low-lying land is submerged (flooded) by seawater

Cyclone:

Cyclones are caused by atmospheric disturbances around a low-pressure area distinguished and often destructive air circulation.

Tsunami:

Tsunamis are giant waves caused by earthquakes or volcanic eruptions under the sea.

Explanation

Explanation

The Isthmus of Panama connects North America and South America.

It is a narrow strip of land that also separates the Pacific Ocean from the Atlantic Ocean via the Panama Canal.

Explanation

"Has taught" is present perfect tense.

It is used for actions that started in the past and continue to the present.

The phrase "since 23rd July 2007" indicates the starting point of a continuous action up to now.