Explanation

• The kidney is an important organ responsible for filtering blood and forming urine.
• Its structural and functional unit is the nephron.
• Each kidney contains millions of nephrons.
• They perform filtration, reabsorption, and secretion.

Last verified on 23-04-2026

Explanation

• Feathers are the defining external characteristic of birds.
• They provide insulation and assist in flight.
• Birds are warm-blooded vertebrates.

Last verified on 06-11-2026

Explanation

Explanation

• Lampreys belong to the group Cyclostomata.
• They lack true jaws and paired fins.
• Their mouth is circular and adapted for attachment.

Last verified on 06-11-2026

Explanation

• The notochord is a flexible, rod-shaped structure that is present during the embryonic stage of all chordates
• It provides support and defines the primitive axis of the body.
• This characteristic is a key feature that distinguishes chordates from non-chordates.

Last verified on 06-11-2026

Explanation

• Leeches are segmented worms belonging to phylum Annelida.
• Their bodies show metameric segmentation.
• They possess a true coelom, although it is reduced in leeches.

Last verified on 06-11-2026

Explanation

• Radula is a ribbon-like feeding organ found in most molluscs.
• It contains rows of tiny teeth used to scrape or cut food.
• Bivalves generally lack a radula.

Last verified on 06-11-2026

Explanation

• Malpighian tubules remove nitrogenous wastes from the insect's body.
• They help maintain water and salt balance.
• They are connected to the digestive tract.

Last verified on 06-11-2026

Explanation

Explanation

• The three standard stop codons in mRNA are UAA, UAG, and UGA.
• These codons signal the termination of protein synthesis.
• UGG codes for the amino acid tryptophan.

Last verified on 06-11-2026