Question

Raphides are excretory materials of-

• A. Porifera
• B. Plants
• C. Cnidaria
• D. All of these

Answer 1

The correct option is B

Plants

The correct option is (B):

Explanation of the correct option:
Excretion:

1. The removal of metabolic waste material from the body is called Excretion.
2. Such as urea, uric acid, and amino acids are excretory materials.

Raphides:

1. Raphides are a waste material of plants stored in the fruit of plants.
2. The plant wastes get stored in the fruits of the plant in the form of solid bodies called raphides.
3. These wastes are removed when the fruits get detached from the plant.
4. Raphides are found in plants in the shape of needle crystals of calcium oxalate as the monohydrate or calcium carbonate as aragonitic found in plants.

Explanation of the incorrect option:-

Option (A):
Porifera:-

1. The word ‘Porifera’ means ‘organisms with holes’.
2. They are commonly called sponges.
3. They are mostly found in the marine environment, and freshwater,
4. The excretory material of Porifera animals is Ammonia.

Option (C):

Cnidaria:-

1. These animals mostly live in marine water and freshwater.
2. The excretory material of Cnidaria animals is Ammonia.

Final answer:- Hence, raphides are excretory materials of Plants.