Question

Excretory organs of earthworm are:

• A. Malpighian tubules
• B. Nephridia
• C. Kidneys
• D. Flame cells

Answer 1

The correct option is B

Nephridia

The correct option is B:

Explanation of the correct option :

1. Nephridia are segmentally arranged coiled tubules that make up the excretory organs.
2. Septal nephridia, integumentary nephridia, and pharyngeal nephridia are the three forms.
3. A nephridium is a funnel that catches extra fluid from the coelomic chamber at first.
4. The funnel connects to a tubular component of the nephridium, which transports wastes to the digestive tube through a pore in the body wall. Nephridia are segmentally arranged coiled tubules that make up the excretory organs.

Explanation of the incorrect option :

Option A:

1. It is the excretory organ of insects, myriapods, arachnids, and tardigrades.

Option C:

1. It is an excretory organ of vertebrates.

Option D:

1. It is an excretory organ of flatworms.

Final answer: Excretory organs of earthworms are: Nephridia