Question

Star fish is a marine echinoderm. What is the symmetry seen in its larva and adult stages?

• A. Pentameric radial symmetry is seen in larva and bilateral symmetry in adult
• B. Bilateral symmetry is seen in larva and pentameric radial symmetry in adult
• C. Pentameric radial symmetry is seen in both larva and adult stages
• D. Bilateral symmetry is seen in both larva and adult stages.

Answer 1

The correct option is B Bilateral symmetry is seen in larva and pentameric radial symmetry in adult

Starfish-like all echinoderms has bilateral symmetry during is present in their larval stages. However, during metamorphosis, they lose this bilateral symmetry and develop some kind of radial symmetry, typically pentameric.

So, the correct answer is ' Bilateral symmetry is seen in larva and pentameric radial symmetry in the adult'.