Question

Choose the correct answers from the alternatives given.
The only one of the following phyla with no terrestrial forms is:

• A. Echinodermata
• B. Arthropoda
• C. Mollusca
• D. Annelida

Answer 1

The correct option is A Echinodermata

Echinoderms are exclusively marine animals, with only a few species tolerating even brackish water. Arthropods are found in virtually every known marine (ocean-based), freshwater, and terrestrial (land-based) ecosystem, and vary tremendously in their habitats, life histories, and dietary preferences. Molluscs occur in almost every habitat found on Earth, where they are often the most conspicuous organisms. Annelids are found throughout the world, from deep ocean bottoms to high mountain glaciers.

So, the correct option is, 'Echinodermata'.