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Whittaker classified organisms into five...

Whittaker classified organisms into five kingdoms. Of these the last kingdom is divided into two groups, invertebrates and vertebrates. Answer the following questions about this group:
Which phylum comprises animals that may exist in either of two forms: one that is attached to the ocean floor and the other that is free-floating? Mention one more characteristic feature of this phylum.

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ICSE-MODEL TEST PAPER II-SECTION II
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  4. List the types of glia cells present in brain.

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  6. Function of bone is to provide

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  7. Give biological explanations for the following: Birds are able to fl...

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  8. Give biological explanations for the following: Most molluscs also h...

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  9. Give biological explanations for the following: Classification of pl...

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  10. Give biological explanations for the following: The mode of nutritio...

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  11. Give biological explanations for the following: Large air cavities a...

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  12. What is stomata's function?

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  13. Which part bears pores for exchange of gases in plants?

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  14. what is the function of the leaves in plants.

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  15. Which part of the plant tissue synthesizes food?

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  16. Two identical blocks A and B, each of mass m=3kg, are connected with t...

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  17. Two identical blocks A and B, each of mass m=3kg, are connected with t...

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  18. Whittaker classified organisms into five kingdoms. Of these the last k...

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  19. Whittaker classified organisms into five kingdoms. Of these the last k...

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  20. Whittaker classified organisms into five kingdoms. Of these the last k...

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