Question

Which one of the following organisms are correctly matched with their excretory organs?

• A. Earthworm - Pharyngeal, integumentary and septal nephridia
• B. Cockroach - Malpighian tubules and entire caeca
• C. Frog - Kidneys, skin and buccal epithelium
• D. Humans - Kidney, sebaceous glands and fear glands

Answer 1

The correct option is A Earthworm - Pharyngeal, integumentary and septal nephridia

Nephridia are the excretory organs in earthworms. They function as the kidneys. Pharyngeal nephridia are present in the 4th, 5th, and 6th segments of the alimentary canal.

Integumentary nephridia are starting from the 7th segment and present till the last segment and the septal nephridia are present on the septum of the 15th and 16th segments.

A. Earthworm excrete through the nephridia.

B. Cockroach excretes through Malpighian tubules and caeca acts as digestive gland.

C. Frogs excrete through the kidneys. They respire through the skin and buccal epithelium.

D. Humans have kidneys as the major excretory organs. Sebaceous glands are accessory excretory organs. Fear glands do not perform excretion in humans.

So, the correct answer is 'Earthworm- Pharyngeal, integumentary, and septal nephridia.'