Question

What are the excretory organs of Platyhelminthes?

• A. Renette cells
• B. Flame cells
• C. Green glands
• D. Malpighian tubules

Hint:

Excretory organs:
• Platyhelminthes \( \rightarrow \) Flame cells
• Insects \( \rightarrow \) Malpighian tubules
• Crustaceans \( \rightarrow \) Green glands

Answer 1

The Correct Option is B

Concept:
Platyhelminthes are flatworms such as:
• Planaria
• Tapeworm
• Liver fluke Their excretory system contains specialized structures called: \[ \boxed{\text{Flame cells}} \] Flame cells help in:
• Excretion
• Osmoregulation

Step 1: Understand flame cells.
Flame cells contain cilia that beat continuously. The movement resembles a flickering flame, hence the name: \[ \text{Flame cells} \] They remove:
• Nitrogenous wastes
• Excess water

Step 2: Differentiate excretory organs in animals.
Renette cells:
• Found in nematodes Green glands:
• Found in crustaceans Malpighian tubules:
• Found in insects Flame cells:
• Found in platyhelminthes

Step 3: Analyze options carefully.
Option (A): Renette cells
Not present in platyhelminthes. Incorrect. Option (B): Flame cells
Correct excretory organs. Correct. Option (C): Green glands
Found in crustaceans. Incorrect. Option (D): Malpighian tubules
Found in insects. Incorrect.

Step 4: Choose the correct answer.
Thus, excretory organs of Platyhelminthes are: \[ \boxed{\text{Flame cells}} \] Hence, \[ \boxed{(2)\ \text{Flame cells}} \]