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Gas vacuoles /contractile vacuoles help ...

Gas vacuoles /contractile vacuoles help in osmoregulation.

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Define osmoregulation.

Which hormones help in osmoregulation?

What are vacuoles?

Why do all the freshwater organisms have contractile vacuoles whereas majority of marine organisms lack them?

Write 'True' or 'False' : Vasopressin helps in osmoregulation and exerts pressure effect.

When a fresh-water protozoan possessing a contractile vacuole,is placed in a glass containing marine water,the vacuole will:

Air helps in moving-

Guard cells help in:

What is meant by the term osmoregulation?

MODERN PUBLICATION-CELL : THE UNIT OF LIFE-EXERCISE
  1. Light-independent reaction of photosynthesis occur in thylakoids/strom...

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  2. 9 + 2 microtubular arrangement is found in Basal body/ flagellum.

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  3. Gas vacuoles /contractile vacuoles help in osmoregulation.

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  4. Lightly stained and transcriptionally active part of chromatin is call...

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  5. A chromosome with a centromere near its called Acrocentric/metacentric...

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  6. What does " Theory of Lineage" state? Give its significance.

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  7. Name the three basic components of cell.

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  8. Differentiate between prokaryotic and eukarytic cells.

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  9. Why is plasma membrane of bacterium also called respiratory membrane?

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  10. What are mesosomes?State their function.

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  11. Define nucleoid.

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  12. Give the term for the extranuclear rings of DNA molecules.

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  13. How does the bacterial flagellum differ from that of eukaryote?

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  14. What are hemipens? Give their function.

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  15. Differentiate gram positive and gram negative bacteria.

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  16. What is the main feature of the plasma membrane?

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  17. Why are phospholipid molecules called amphipathic molecule?

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  18. Who proposed fluid mosiaic model of plasma membrane?

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  19. Why is the plasma membrane called selectively permeable membrane ?

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  20. Differentiate passive transport and active transport.

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