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- #Class 11
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The sponges are
Option: 1
Asymmetrical and floating
Option: 2
Symmetrical and sessile
Option: 3
Symmetrical and floating
Option: 4
Asymmetrical and sessile
Answers (1)
Phylum Porifera and Morphological Features of Porifera -
- Phylum Porifera contains the simplest invertebrate animals.
- They are commonly called as ‘sponges’.
- They possess cellular level of organization. Different cells perform the essential functions of ingestion, digestion, excretion, reproduction etc.
- They are sessile, that is, they remain fixed at a place. The larvae are capable of swimming.
- They are filter-feeders.
- Water current allows their nutrition, circulation and excretion.
- They possess a characteristic water canal system.
-
Sponges (Porifera) are asymmetrical and sessile animals.
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