Question

Spines of calcium carbonate are present on thw body to which phylum they velong

Answer 1

• Sea urchins or urchins are typically spiny, globular animals.
• About 950 species live on the seabed, inhabiting all oceans and depth zones.
• Their tests (hard shells) are round and spiny.
• Sea urchins move slowly, crawling with their tube feet, and sometimes pushing themselves with their spines.
• They feed primarily on algae but also eat slow-moving or sessile animals. Their predators include sea otters, starfish, wolf eels, and triggerfish.

-SH

Answer 2

phylum coelentrata is the correct answer