Question

Which one of the following groups of structure or organs have similar function?

• A. Typhlosole in earthworm, intestinal villi in rat and contractile vacuole in Amoeba.
• B. Nephridia in earthworm, Malpighian tubules in cockroach and urinary tubules in rat.
• C. Antennae of-cockroach, tympanum of frog and clitellum of earthworm.
• D. Incisors of rat, gizzard (proventriculus) of cockroach and tube feet of starfish.

Answer 1

The correct option is B Nephridia in earthworm, Malpighian tubules in cockroach and urinary tubules in rat.

The nephridia are coiled tubular structures of earthworm, which is an invertebrate organ. It occurs in pairs and performs a function similar to the vertebrate kidney.

The excretory organ of cockroach is the Malpighian tubules. It is found at the junction of the midgut and hindgut and are about 150 in number. They are fine, yellow coloured and branched threads present in bundles. They lie freely in the haemolymph.

Urinary tubules is any of the long, winding tubules of the vertebrate kidney in which urine is formed in rats.

Therefore, the correct answer is option B.