Explanation

• Red blood cells lack a nucleus to maximize space for hemoglobin, which carries oxygen.
• More hemoglobin means more oxygen transport.
• This makes RBCs highly efficient for gas exchange.
• Lack of nucleus also gives them a flexible shape.
• This helps them pass through narrow blood capillaries.

Last verified on 14-06-2026

Explanation

To convert Celsius to Kelvin, use: K = °C + 273

• Given temperature = 37°C
• 37 + 273 = 310 K

Additional information:

• 0°C = 273 K
• 100°C = 373 K

Last verified on 06-09-2026

Explanation

• The spinal cord is not part of the brain; it is part of the central nervous system (CNS).
• The brain is broadly divided into forebrain, midbrain, and hindbrain.
• Pons and medulla oblongata are parts of the brainstem.
• The hindbrain includes the pons, medulla oblongata, and cerebellum.

Last verified on 06-09-2026

Explanation

• Blood is red because of a protein called hemoglobin inside our red blood cells,
• Which contains iron that changes color when it binds to oxygen

Last updated by NS on 5-09-2026

Explanation

• Pressure cookers cook food faster due to Gay-Lussac’s Law.
• This law states that pressure increases when temperature increases in a closed container.
• In a pressure cooker, steam is trapped, increasing pressure.
• Higher pressure raises the boiling point of water above 100°C.
• Food cooks at a higher temperature, so it cooks faster.

Last verified on 14-06-2026