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Write down two unique characters of Pori...

Write down two unique characters of Porifera.

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The correct Answer is:
N/a
(i) Presence of canal system and
(b) Skeleton of spicules.
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LAKHMIR SINGH & MANJIT KAUR-DIVERSITY IN LIVING ORGANISMS-Diversity In Living Organisms
  1. What is the skeleton of sponges made up of ?

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  2. Name the following : (a) Simplest sponges , (b) Commonly known as ...

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  3. Write down two unique characters of Porifera.

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  4. What is the name of gelatinous layer existing between two germ layer o...

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  5. What is the body symmetry of cnidarians or coelenterates ?

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  6. What type of digestion takes place in cnidarians ?

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  7. In which phylum, nervous system develops for the first time ?

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  8. Name the organisms in which asexual reproduction takes place by buddin...

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  9. To which phylum do sponges belong ?

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  10. What is alternation of generation ?

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  11. What is common name of following : (a) Pleurobranchia and (b) Cest...

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  12. Give an example of ctenophora.

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  13. What are colloblasts ?

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  14. What types of body symmetry is present in Platyhelminthes ?

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  15. Name the excretory organs in Platyhelminthes.

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  16. Name the following : (a) Free living Platyheminthes , (b) Scientif...

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  17. Which type of body organisation is present in Platyhelminthes ?

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  18. Give one example of : (a) Platyhelminthes ? (b) Nematoda.

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  19. What is common name of nematoda.

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  20. Give the scientific name of the following : (a) Roundworm , (b) Fila...

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