Question

The term not applicable to echinodermata
A) Madreporite
B) Podia
C) Marine
D) Bilateral symmetry

Answer 1

Option D) The term not applicable to Echinodermata is bilateral symmetry.

• Echinodermata is one of the many phyla under invertebrates.
• The organisms belonging to Echinodermata are only marine. Freshwater or brackish water organisms do not exist in the phyla.
• Since echinoderms only stay in marine water, they have a water vascular system that makes sure that impurities and toxic substances do not enter the body. The water vascular system is called madreporite.
• For locomotion, echinoderms possess tube feet called podia. Apart from locomotion, they also help in respiration and feeding.
• Therefore the term not applicable to echinoderms is bilateral symmetry.

Answer 2

Answer:

Bilateral symmetry is not applicable to Echinodermata.  

Explanation:

Madreporite: The most distinctive feature of Phylum Echinodermata is the water vascular system, also called as Ambulacral system.

• Madreporite is a perforated plate present in the system.
• Water enters the system through the pores of the madreporite.

Podia: Tube feet is also known as podia.

• It helps in locomotion.
• It helps in capturing food and respiration.  
• It is coelomic origin.

Marine: They are exclusively marine.

• No traces of any terrestrial till date.

Bilateral symmetry: The larvae show bilateral symmetry but the adults show radially symmetrical.

Hence, Phylum Echinodermata have madreporite, podia and they are marine organisms.