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Evolutionary sequence of canal system in...

Evolutionary sequence of canal system in sponges is

A

Sycon `to` Ascon `to` Leucon

B

Leucon `to` Sycon `to` Ascon

C

Ascon `to` Sycon `to` Leucon

D

Sycon `to` Leucon `to` Ascon

Text Solution

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The correct Answer is:
B
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ARIHANT NEET-ANIMALIA -I (LOWER INVERTEBRATES)-CHAPTER EXERCISES (Taking it together) Assorted Questions of the Chapter for Advanced Level Practise
  1. Sponges are primitive multicellular animals and have

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

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  3. Evolutionary sequence of canal system in sponges is

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  4. Digestion in Leucosolenia and other sponges is

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

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

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  7. Regeneration in Hydra is

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

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  9. Which is correct about nematocyst in Hydea

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  10. Zoochlorellae and zooxanthallae present in Hydra are

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

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

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  13. Gonads of Obelia occur

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  14. Hydrozoa is distinguished from other coelenterates by

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  15. Spermatogonia in Hydra develop from

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  16. The body of Ascaris is

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

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

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  19. Sea Anemone is characterised by

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  20. Comb plates of ctenophores possess

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