Answers

2014-08-10T09:38:28+05:30
It looks like hollow pipes with small mounds and rough surface it has some cilliated structures on its body .it is found in clusters .under sea water only....

hope it helps u 
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  • Brainly User
2014-08-10T23:38:41+05:30
They look like sack perforated with tiny holes. they have pores and sponges.. they are generally asymmetrical
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