Question

7. Coral are :
(A) Sedentary sponges
(B) Sedentary colenterates
(C) Sedentary ascidian
(D) Free living ctenophores​

Answer 1

Answer:

I think your answer is B

Answer 2

Coral are (B) Sedentary colenterates.

1. Corals belong to phylum coelenterates or cnidarians.
2. Corals are sedentary organisms that form dense colonies in oceans.
3. They are multicellular and diploblastic organisms.
4. Skeleton of corals comprises mainly of calcium carbonate.
5. Corals derive food from symbiotic organisms that live within them.
6. They lack circulatory system and respiration and excretion in them, occurs through diffusion.