Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?
Correct answer: A. Nephridia of earthworm and Malpighian tubules of cockroach - excretory organs
- 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
Explanation
Nephridia are excretory organs of the 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. They open into the intestine and selectively extract Uric acid from the blood. The acid, together with water and salts, is deposited into the hindgut and excreted in the faeces.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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