Which one of these is an example of tubular excretory system called metanephridia?
Correct answer: D. Earthworm.
- A. Planaria.
- B. Cockroach.
- C. Hydra.
- D. Earthworm.
Explanation
Earthworms are Annelids possessing complex metanephridia.
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
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About Excretion
Excretion removes metabolic wastes such as carbon dioxide, urea and excess salts, and differs from egestion, which removes undigested food. Questions cover kidney structure, nephron ultrafiltration, selective reabsorption and urine formation, along with the excretory roles of the lungs, skin and liver in maintaining homeostasis.
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