Explanation

• Platelets, also called thrombocytes.
• They are blood cells that play a vital role in blood clotting.
• When a blood vessel is injured, platelets aggregate to form a plug that stops the bleeding.

Last verified on 02-04-2026

Explanation

• During the day, plants perform photosynthesis, absorbing carbon dioxide and releasing oxygen.
• At night, in the absence of sunlight, they undergo respiration, where they take in oxygen and release carbon dioxide.

Last verified on 02-04-2026

Explanation

Explanation

• The normal resting heart rate of an adult human is about 70 beats per minute.
• It can vary depending on age, fitness, and health condition.

Additional information:

• Normal adult: 60–100 beats/min
• Athletes: 40–60 beats/min
• Children: 70–120 beats/min
• Infants: 100–160 beats/min

Last verified on 31-03-2026

Explanation

• Jaundice is a condition characterized by yellowing of the skin and eyes.
• It is caused by excess bilirubin due to liver dysfunction or disease.

Last verified on 01-04-2026

Explanation

• Calcium phosphate, specifically hydroxyapatite, is the main component of bones and teeth.
• It is a calcium salt of phosphoric acid.
• It is the primary mineral constituent of bone tissue, making up about 70-80% of bone dry weight.
• Calcium phosphate gives bones and teeth their strength and rigidity.

Last verified on 31-03-2026

Explanation

• Diseases can be caused by bacteria, viruses, or other pathogens.
• Flu (Influenza) and Jaundice (Hepatitis A, B, or C) are caused by viruses.
• Typhoid and Cholera are caused by bacteria.
• Therefore, Typhoid and Cholera are not viral diseases.

Last verified on 31-03-2026

Explanation

• Hepatitis A spreads mainly through contaminated water or food.
• Common in areas with poor sanitation.
• It is a fecal-oral transmission disease.

Last verified on 31-03-2026

Explanation

• Hepatitis A is primarily spread through the fecal-oral route, often via consumption of contaminated food or water.
• It can be prevented by maintaining good hygiene, ensuring safe drinking water, and vaccination.

Last verified on 31-03-2026

Explanation

• The average adult has a blood volume of about 5 liters (5-6 litres), though this can range from 4.5 to 5.5 liters.
• Male: About 5.5 liters.
• Female: About 4.5 liters.
• Proportion: Blood makes up roughly 7% of a person's total body weight. 

Last verified on 30-03-2026