Explanation

• Hydrophytes have poorly developed roots.
• Because they live in water and can absorb water directly from their surroundings.

Additional information:

Key Characteristics of Hydrophytes:

• Reduced xylem tissue
• Large air spaces in tissues (aerenchyma)
• Thin or absent cuticle
• Flexible stems and leaves

Examples include water lily and Hydrilla.

Last verified on 23-06-2026

Explanation

• William Harvey discovered the circulation of blood.
• He was the first physician to completely describe systemic blood circulation.
• Famous book: De Motu Cordis (On the Motion of the Heart and Blood) (1628)
• He is known as the Father of Circulation of Blood.

Additional information:

• Birth: 1578
• Death: 1657

Last verified on 23-06-2026

Explanation

• Damage to alveoli due to smoking leads to reduced gas exchange efficiency in the lungs.
• Alveoli are tiny air sacs where oxygen enters blood and carbon dioxide is removed.
• Smoking destroys alveolar walls, reducing surface area for gas exchange.
• This causes breathing problems and diseases like emphysema and COPD.

Last verified on 22-06-2026

Explanation

• The cerebellum controls body posture, balance, and coordination.
• It helps muscles work smoothly during movement.
• It ensures the body stays balanced while standing or walking.
• It coordinates voluntary muscle actions.
• Damage to it causes loss of balance and shaky movements.

Last verified on 21-06-2026

Explanation

• Vascular tissue is present in both angiosperms and gymnosperms.
• It includes xylem and phloem.
• It helps in transport of water and food.
• Both plant groups are vascular plants.
• It is absent in non-vascular plants like mosses.

Last verified on 18-06-2026