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Why are the parasitic forms of Plathelmi...

Why are the parasitic forms of Plathelminthes provided with hooks and sukers, while the free-living forms do not have them?

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ASSAM ACADEMIC CENTRE-ANIMAL KINGDOM-EXAMPLE
  1. Name the flatworm that has high power of regeneration.

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  2. Animals of Platyhelminthes are described as acoelomates. Justify.

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  3. Why are the parasitic forms of Plathelminthes provided with hooks and ...

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  4. Why are animals of Aschelminthes called roundworm?

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  5. Why is the coelom in Ascaris described as pseudocoelom?

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  6. Why is the phylum Annelida named so?

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  7. Name the phylum where animals have haemoglobin dissolved in the plasma...

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  8. What is the function of parapodia? Name one animal that has parapodia.

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  9. How is respiration carried out in annelids?

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  10. Name the excretory organs of : cockroach

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  11. Name the excretory organs of : earthworm.

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  12. What speciality do the legs/appendages of animals belonging to phylum ...

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  13. Bring out the similarity found in the circulation of Arthropoda and Mo...

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  14. Name the two sub-phyla reffered to as protochordates.

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  15. How do animals of Urochordata differ from those of Caphlochordata, wit...

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  16. Name the class of fish where tail flin is heterocercal and fertilisati...

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  17. Name the reptile that has four-chambered heart.

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  18. Name the two classes of vertebrate animals whose heart is four-chamber...

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  19. Write the scientific name of : a flightless bird.

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  20. Write the scientific name of : an oviparous mammal.

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