Question on: JAMB Biology - 2015
One of these is used for excretion in earthworm
A
Contractile vacuole
B
Flame cell
C
Malpighian tubule
D
Nephridium
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Correct Option: D
The correct answer is **Nephridium**. Here's why:
* **Nephridia:** These are the primary excretory organs in earthworms. They filter waste products from the body fluids and eliminate them.
* **Contractile vacuole:** This is involved in osmoregulation (water balance) and waste removal in some protists, not earthworms.
* **Flame cells:** Flame cells are excretory structures found in flatworms.
* **Malpighian tubule:** Malpighian tubules are excretory structures found in insects and other arthropods.
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