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Select the distinguishable characters of...

Select the distinguishable characters of ophiura from balanoglossus
(a) Has an endoskeleton of calcareous ossicles
(b) Has water vascular system
(c) Is radially symmetrical
(d) All of the above

A

Has an endoskeleton of calcareous ossicles

B

Has water vascular system

C

Is radially symmetrical

D

All of the above

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the distinguishable characters of Ophiura (brittle star) from Balanoglossus (acorn worm), we need to analyze each option provided: 1. **Option (a): Has an endoskeleton of calcareous ossicles** - Ophiura possesses an endoskeleton made of calcareous ossicles, which are small calcium carbonate structures. This feature is a distinguishing characteristic of Ophiura. In contrast, Balanoglossus does not have an endoskeleton; it is a soft-bodied organism. Therefore, this option is correct. 2. **Option (b): Has a water vascular system** - Ophiura has a water vascular system, which is a unique feature of echinoderms. Balanoglossus, while it has a different type of water system, does not possess a true water vascular system like that of Ophiura. Thus, this option is also correct. 3. **Option (c): Is radially symmetrical** - Ophiura exhibits radial symmetry, meaning its body parts are arranged around a central axis. In contrast, Balanoglossus shows bilateral symmetry, where its body can be divided into two mirror-image halves. Therefore, this option is correct as well. 4. **Option (d): All of the above** - Since options (a), (b), and (c) are all correct and distinguishable characters of Ophiura from Balanoglossus, option (d) is also correct. **Final Answer: (d) All of the above**
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