Explanation

• The average normal body temperature is generally accepted as 98.6°F (37°C).
• A temperature over 100.4°F (38°C) means you have a fever.

Additional Information:

• Hypothermia is the term used for temperature less than 36.50°C.
• Mild Pyrexia is the term used for temperature (99-100°F).
• Moderate Pyrexia is the term used for temperature (100-103°F).
• Severe Pyrexia is the term used for temperature (103-105°F).

Explanation

• The nucleus contains DNA (genetic material).
• It controls all cellular activities like growth, division, and protein synthesis.
• That is why it is called the control center of the cell.

Last verified on 25-05-2026

Explanation

• Vitamins act as protective nutrients in the body.
• They help regulate metabolism, immunity, and normal body functions.
• Their deficiency leads to specific diseases like scurvy (Vitamin C) and rickets (Vitamin D).

Last verified on 25-05-2026

Explanation

• Tube wells extract water from underground layers called aquifers.
• They are widely used for irrigation and drinking water.
• Water is pumped to the surface using electric or diesel pumps.
• Tube wells are important in agricultural areas.
• They help where surface water is limited.

Last verified on 24-05-2026

Explanation

• Ribosomes are the sites of protein synthesis in the cell.
• They read genetic instructions (mRNA) and assemble amino acids into proteins.
• They can be found free in the cytoplasm or attached to rough ER.
• They are made of RNA and proteins.
• They are present in both prokaryotic and eukaryotic cells.

Last verified on 06-05-2026

Explanation

• Vitamin A is essential for healthy skin and tissues.
• It helps in growth and repair of skin cells.
• It maintains epithelial tissues in good condition.
• Deficiency can cause dry and rough skin problems.
• It is also important for vision and immunity.

Last verified on 24-05-2026

Explanation

• Groundwater is the main safe source of drinking water.
• It is found beneath the Earth’s surface in aquifers.
• It is naturally filtered through soil and rocks.
• It is commonly used in wells, hand pumps, and tube wells.

Last verified on 24-05-2026

Explanation

• Mitochondria are known as the “powerhouse of the cell.”
• They produce energy in the form of ATP.
• This energy is used for all cellular activities.
• Found in almost all eukaryotic cells.

Last verified on 24-05-2026

Explanation

• Fats are essential nutrients that store energy in the body.
• They help in maintaining body temperature by providing insulation.
• Fat layer under skin reduces heat loss.
• They also protect internal organs from shock.

Last verified on 24-05-2026

Explanation

• The cell membrane is a thin protective layer surrounding the cell.
• It controls the movement of substances into and out of the cell.
• It is also called the plasma membrane.
• It is selectively permeable.

Last verified on 23-05-2026