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Give the characteristic features of hemi...

Give the characteristic features of hemichordata.

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Characteristics features of Hemichordata.
They are marine, burrowing, soft-bodied worms.
They are unsegmented.
Triploblastic and bilaterally symmetrical.
Notochord is present in embryonic stages only in proboscis region.
Body is made up of three distinct parts proboscis, collar and trunk
Respiration by gills
Reproduce sexually E.g., Balanoglossus, Herdmania, Amphioxus
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PEARSON IIT JEE FOUNDATION-DIVERSITY IN LIVING WORLD- ANIMALS-MASTERING THE CONCEPTS (KNOWLEDGE AND UNDERSTANDING)
  1. Define the following terms of giving examples. Diploblastic

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  2. Mention the characteristics taken as basis for the classification of a...

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  3. Give the characteristic features of hemichordata.

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  4. Distinguish between diploblastic animals and triploblastic animals.

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  5. What is meant by a true coelom? On what basis coelomates are further c...

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  6. Define sexual dimorphism. Give an example of an invertebrate phylum wh...

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  7. Differentiate between oviparous and viviparous animals.

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  8. State two differences between internal and external fertilization.

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  9. Give the difference between . Direct and Indirect development

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  10. How do the following terms originate? Nematoda

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  11. How do the following terms originate? Echinodermata

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  12. How do the following terms originate? Porifera.

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  13. Write short notes on the following. Ecdysis

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  14. Write short notes on the following. Polymorphism

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  15. What is meant by osmoregulation?

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  16. List out the characteristic features of protochordates.

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  17. Distinguish between Polyp and Medusa.

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  18. Sponges are considered as pore bearers. Discuss.

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  19. Explain the following terms. Tetrapodus

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  20. Explain the following terms. Pentadactyl

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