A.Star-fishes
B.Sponges
C.Corals
D.All of these
Related Mcqs:
- Tissues are not found in:
- Ring-canal is found in the:
- Canal system is characteristic of:
- Which of the following marine form is more susceptible for extinction?
- Ring-canal is found in:
- Water vascular system of coelomic canals is found in:
- Scolidon or dog fish belong to the group of fishes called__________??
- Which of the following marine fishes are considered direct descendents of fresh water ancestors??
- Ornamental sponges belong to the group of:
- Excretory substance is ammonia in:
