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Which is correct about nematocyst in Hyd...

Which is correct about nematocyst in Hydea

A

It is reused

B

Ejection is conditioned reflex

C

Ejection occurs in response to contact and pierces the prey

D

Prevents coming in contact with other Hydra

Text Solution

Verified by Experts

The correct Answer is:
C
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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. Regeneration in Hydra is

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

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  3. Which is correct about nematocyst in Hydea

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  4. Zoochlorellae and zooxanthallae present in Hydra are

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

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

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  7. Gonads of Obelia occur

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  8. Hydrozoa is distinguished from other coelenterates by

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  9. Spermatogonia in Hydra develop from

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  10. The body of Ascaris is

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

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

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  13. Sea Anemone is characterised by

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  14. Comb plates of ctenophores possess

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  15. What is present in mesoglea of ctenophores which make it a loose layer...

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  16. Biradial symmetry and lack of cnidoblasts are the characteristics of

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  17. Parasitrc adaptation of flatworms is

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  18. Turbellarian epiderms differs from that of a trematode due to

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  19. The terminal end of Fasciola is absent . The undigested food gets lost...

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  20. The disease bilharzia is an infectious disease leading to skin rash , ...

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