Explanation

The carbon compound which forms the endoskeleton and exoskeleton of animals is calcium carbonate.

Seashells are the exoskeletons of mollusks such as snails, clams oysters and many others.

Such shells have three distinct layers.

They are composed mostly of calcium carbonate with only a small quantity of protein--no more than 2 percent.

Explanation

IMPETUOUS means بے چین

RASH means بے چین

Explanation

International wrestling has four age categories for women's freestyle wrestling:

• Schoolgirls: Ages 14–15, or 13 with a medical certificate and parental authorization
• Cadets: Ages 16–17, or 15 with a medical certificate and parental authorization
• Juniors: Ages 18–20, or 17 with a medical certificate and parental authorization
• Seniors: Ages 20 and up

Explanation

Asar-ul-Sanadeed, a detailed historical and architectural account of Delhi.

It was compiled by Sir Syed Ahmad Khan in 1847.

It showcasing his interest in history and culture.

Explanation

Explanation

Constitution of 1973:

Zulifqar Ali Bhutto introduced new constitution in Pakistan on August 14, 1973.

According to 1973 constitution, both national assembly and senate elect president for Pakistan whereas the prime minister is selected by national assembly.

Bicameral Legislature system was introduced for the first time in Pakistan in the constitution of 1973.

According to this constitution, a candidate must be 25 to contest for the election of national assembly.

Explanation

• Humidity in the air was measured by a Hygrometer.
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• A hygrometer is an instrument used to measure relative humidity.
• Humidity is the measure of the amount of moisture in the air.
• A psychrometer is an example of a hygrometer.
• hygrometer.
  
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• The humidity in the air tells us about the ratio of Water vapors in the air

Explanation

Explanation

The keyboard shortcut to close a tab on a browser is Ctrl + W.

Here are some other keyboard shortcuts for browsers:

• Ctrl + T: Opens a new tab
• Ctrl + N: Opens a new window
• Ctrl + Shift + W: Closes the current window and all tabs
• Ctrl + Q: Closes the current window
• Alt + Right arrow: Opens the next page from your browsing history in the current tab
• Ctrl + F4: Closes the current tab
• Alt + F4: Closes the active window
• Alt + Space then n: Minimizes the current window

Explanation

• Venus, often called the "Evening Star" or "Morning Star," appears in the western sky after sunset.
• Venus is the brightest planet.
• It has an atmosphere but no moons.
• It's identical in size, chemistry and gravity.
• It has volcanoes, mountains and sand.
• It's also called Sister Planet of the Earth.