Question

Phylum X has a rough and spiny body. It has neither head nor tail. Their body is usually star or ball shaped. Where is X commonly found?

• A. Marine body
• B. Fresh water
• C. Lakes
• D. Glaciers

Answer 1

The correct option is A Marine body

Phylum X is echinodermata, they are also called as spiny bodied animals. (Echinos: spiny, derma: skin).

These animals show following characteristics:

• These are exclusively marine.
• The shape of the body is flat, star-like, spherical or elongated.
• Mouth is present on the ventral side while anus is present on the dorsal side.
• Examples of echinoderms are starfish, sea urchin, sea lily, cucumaria (sea cucumber), Antedon etc.