Which segmented excretory organs extract metabolic coelomic waste in annelid earthworms through ciliated nephrostome funnels?
Answer and explanation
Correct answer: D. nephridia
- Step 1: Earthworms have a pair of metanephridia in each body segment. Step 2. The ciliated funnel (nephrostome) draws coelomic fluid into a convoluted tubule where useful salts/water are reabsorbed, discharging waste via a nephridiopore. Answer: nephridia. Why not the others: Flame cells are in flatworms; Malpighian tubules in insects; green glands in crustaceans.
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