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

• Herpetology is the branch of zoology that studies reptiles and amphibians.
• Reptiles include: snakes, lizards, crocodiles, turtles.
• Amphibians include: frogs, toads, salamanders.
• The word comes from Greek “herpeton” meaning creeping animal.

Last verified on 09-06-2026

Explanation

• Syncytial theory explains the origin of multicellular animals (metazoa).
• It suggests that metazoans evolved from a multinucleated single cell (syncytium).
• Cell membranes later formed around nuclei to create separate cells.
• It explains early evolution of multicellular organisms.

Last verified on 04-06-2026

Explanation

• In dragonfly, the circulatory system does not transport gases.
• Gas exchange occurs through a tracheal system.
• Air directly reaches tissues through spiracles and tracheae.
• Blood is not involved in oxygen transport.

Last verified on 04-06-2026

Explanation

• Bronchioles are the narrowest and most numerous air passages in lungs.
• They branch from bronchi and lead to alveoli.
• They help in controlling airflow in the lungs.
• They are an important part of the respiratory system.

Last verified on 04-06-2026