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Sponges are primitive multicellular anim...

Sponges are primitive multicellular animals and have

A

cellular level of organisation

B

tissue level of organisation

C

organ level of organisation

D

organ system level of organisation

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The correct Answer is:
A
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[A] : Sponges are primitive multicellular animals that probably evolved a multicellular structure independently of other animals . [R] : Sponges are stationary animals and remain fixed to substratum while water passes over them .

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Sponges occur in

Assertion : Sponges are multicellular. Reason : Sponges have tissue level of organisation.

Sexually reproducing multicellular animals start their development from :-

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______are primitive relative of animals.

ARIHANT NEET-ANIMALIA -I (LOWER INVERTEBRATES)-CHAPTER EXERCISES (Taking it together) Assorted Questions of the Chapter for Advanced Level Practise
  1. Choose the incorrect pair.

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  2. Metamerically segmented body exhibits

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  3. Sponges are primitive multicellular animals and have

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  4. Which one of the following is the most distinctive character of sponge...

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  5. Evolutionary sequence of canal system in sponges is

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  6. Digestion in Leucosolenia and other sponges is

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  7. What will happen if the cnidocil is touched with a glass rod?

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  8. Those cnidarians which exist in both (polyp and medusa) forms, exhibit

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  9. Regeneration in Hydra is

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  10. Hydra will regnerate from a fragment, if it contain

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  11. Which is correct about nematocyst in Hydea

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  12. Zoochlorellae and zooxanthallae present in Hydra are

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  13. In Hydra, egestion of undigested food and excretion of nitrogenous was...

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  14. In Hydra , both Flagella and pseudopodia are found in

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  15. Gonads of Obelia occur

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  16. Hydrozoa is distinguished from other coelenterates by

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  17. Spermatogonia in Hydra develop from

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  18. The body of Ascaris is

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  19. The proximal end of hydra has no adhesive disc, which secretes a stick...

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  20. The animals belonging to this class consist the following characterist...

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