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The cell wall is composed of two thin ov...

The cell wall is composed of two thin overlapping shells which fit together like a soap case in

A

desmids

B

diatoms

C

dinoflagellates

D

slime moulds.

Text Solution

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The correct Answer is:
B
The body of diatoms is covered by a transparent siliceous shell (silica deposited in cell wall) known as frustule. The frustule is made of two valves, epitheca and hypotheca. The two valves fit together like a soap box.
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NCERT FINGERTIPS-BIOLOGICAL CLASSIFICATION-Biological Classification
  1. Which of the following groups of organisms are included under chrysoph...

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  2. Chrysophytes are

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  3. The cell wall is composed of two thin overlapping shells which fit tog...

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  4. Siliceous frustules of diatoms being indestructible, piled up at the b...

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  5. Diatomaceous earth is used for all except

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  6. Dinoflagellates are mostly

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  7. A slide under microscope shows following features: (i) Unicellular ...

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  8. Which group of organisms is represented by the given figure?

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  9. Red tides in warm coastal water develop due to the abundance of

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  10. Read the following statements regarding euglenoids and select the inc...

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  11. The given statements describe a group of organisms. (i) Instead of...

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  12. Study the given figure showing structure of Euglena and select the opt...

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  13. Read the following statements and select the correct option Statemen...

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  14. Which of the following statements about Euglena is correct?

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  15. Identify the given figure and select the correct option.

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  16. Match column I with column II and select the correct option from the g...

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  17. The multinucleate slimy mass of protoplasm which forms the body of sli...

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  18. Which of the following combinations of characters is true for slime mo...

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  19. is a parasite of large intestine of human beings and causes the diseas...

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  20. Causal organisms of sleeping sickness and kala-azar belong to which of...

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