Question

14
What is the shape of alimentary canal in Bryozoans?
ব্রাযােজোয়াদের খাদ্যনালীর আকৃতি কী?
15
Where parapodium is found?
কোথায় প্যারাপােডিয়াম দেখা যায়?​

Answer 1

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• In hydroids the tentacles lack cilia. The lophophore projects through an aperture in the cuticle and in some species this is closed by an operculum, or by contraction of muscles. The alimentary canal is U-shaped with the anus outside the lophophore.

• Parapodia are predominantly found in annelids, where they are paired, un-jointed lateral outgrowths that bear the chaetae. In several groups of sea snails and sea slugs, 'parapodium' refers to lateral fleshy protrusions.

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