Which one of the following pairs of items correctly belongs to the category of organs mentioned against it? (a) Nephridia of earthworm and Malpighian tubules of cockroach excretory organs (b) Wings of honey bee and wings of crow homologous organs (c) Thorn of Bougainvillea and tendrils of Cucurbita analogous organs (d) Nictitating membrane and blind spot in human eye vestigial organs
Option A Nephridia are excretory organs of earthworm which consist of a simple or branched tube formed by the ingrowth of ectoderm with cilia at the inner end. Excretory products diffuse into the nephridium and are wafted to the exterior by ciliary action. Malpighian tubules are the organs that are involved in the excretion of nitrogenous wastes in cockroach. It open into the intestine; selectively extract from the blood uric acid, whichtogether with water and salts – is deposited into the hindgut and excreted in the faeces.
