Which of the following animal has a hard calcium carbonate structure
1) Starfish
2) Jellyfish
3) Nereis
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4
Jellyfish
Starfish has an exoskeleton,while nereis us an annelida ......
Answered by
1
Answer:
Nereis has a hard calcium carbonate structure
Option 3
Explanation:
Nereis is a member of Kingdom Animalia and Phylum Annelida. This looks much like some scorpion but, is from different phylum. It is a non-chordate, but for protection as well as support and strength, it has a covering of calcium carbonate over its body like an exoskeleton.
The other options like Starfish belong to Phylum Echinodermata and are a soft creature. Jellyfish belongs to Phylum Cnidaria which is also soft and has no covering.
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