Explanation

• Enzymes are protein-based chemical compounds produced in the cells of living organisms.
• They act as biological catalysts, speeding up chemical reactions.
• Enzymes are essential for digestion, metabolism, and energy production.

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Explanation

• A cell shrinks due to osmosis when placed in a concentrated salt solution.
• Water moves out of the cell into the salt solution through the cell membrane.
• This happens because the outside solution is hypertonic.
• As water leaves the cell, it loses volume and shrinks.
• This process is called osmosis.

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Explanation

• The liver is the largest gland in the human body.
• It is situated in the right upper quadrant of the abdomen, beneath the diaphragm, and above the stomach.
• It is reddish-brown.
• It is weighs approximately 1.5 kg.

• The pineal gland is the smallest gland.
• It about the size of a grain of rice.
• It weighs approximately 150 mg.
• It is part of the endocrine system.

Explanation

• When the volume of a gas decreases at constant temperature, its pressure increases.
• This relationship is explained by Boyle's Law.
• Boyle's Law states that pressure is inversely proportional to volume when temperature remains constant.

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Explanation

• Mangrove forests are found in the Indus Delta region of Sindh.
• The Indus Delta is located where the Indus River meets the Arabian Sea.
• It consists of a network of creeks, estuaries, and distributaries.

Additional information:

• Coniferous Forests → Khyber Pakhtunkhwa, Gilgit-Baltistan, AJK
• Juniper Forests → Ziarat, Balochistan
• Riverine Forests → Along the Indus River in Sindh and Punjab
• Subtropical Pine Forests → Murree, Abbottabad, Hazara region

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Explanation

• Venus comes closest to Earth when it is between Earth and the Sun.

• Minimum distance: about 24 million miles (≈ 38 million km).

• This close approach occurs roughly every 584 days.

Additional Information:

• Mercury can be about 33 million miles away when Venus is on the far side of the Sun.

Last verified on 17-01-2026

Explanation

• A group of wolves is called a Pack.

Additional information:

• Sheep → Flock
• Cattle/Elephants → Herd
• Lions → Pride
• Fish → School (or Shoal)

Last verified on 15-07-2026

Explanation

• C₄H₆O most likely belongs to the Aldehyde or Ketone class.
• The formula indicates two degrees of unsaturation, which can include a carbonyl group (C=O).
• Aldehydes and ketones commonly contain this functional group.

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Explanation

• Resonance is the scientific reason the glass can break.
• It happens when the sound frequency matches the glass's natural frequency.
• The vibrations become very strong and increase rapidly.
• If the vibrations are powerful enough, the glass may shatter.

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Explanation

Moles needed = 0.5 × 0.1 = 0.05 mol

Molar mass of CaCl₂ = 111 g/mol

Required mass = 0.05 × 111 = 5.55 g

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