(D) Diatoms have cell walls that are embedded with silica,which makes them indestructible.Over billions of years,these cell walls accumulate to form l

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The cell wall of diatoms is made of silica.

(D) Diatoms have cell walls that are embedded with silica,which makes them indestructible.Over billions of years,these cell walls accumulate to form large deposits known as 'diatomaceous earth'.Because silica is a poor conductor of heat and is chemically inert,diatomaceous earth is used as an insulating material for boilers and steam pipes.

Class 11 Biology Biological Classification Protista (Unicellular eukaryotes)

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Diatomaceous earth is used to insulate boilers and steam pipes because:

A
The cell wall of diatoms contains calcium deposits.
B
Diatomaceous earth is inexpensive.
C
It is a good conductor of heat.
D
The cell wall of diatoms is made of silica.

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Biological Classification

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Protista (Unicellular eukaryotes)

Some protists possess structures for the regulation of their water content. They are:

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Protista includes:

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Apart from flagellar movement,euglenoids exhibit a special type of movement by contracting and expanding their body,which is known as 'euglenoid movement' or 'metaboly'. Euglenoids are included in the kingdom:

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Statement $X$: Presence of a rigid cell wall and nucleoprotein as genetic material.
Statement $Y$: Examples include $Euglena$,$Dinoflagellates$,$Amoeba$,and $Paramecium$.

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In which organism is a dimorphic nucleus found?

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Diatomaceous earth is used to insulate boilers and steam pipes because:

Similar Questions

Some protists possess structures for the regulation of their water content. They are:

Protista includes:

Apart from flagellar movement,euglenoids exhibit a special type of movement by contracting and expanding their body,which is known as 'euglenoid movement' or 'metaboly'. Euglenoids are included in the kingdom:

Statement $X$: Presence of a rigid cell wall and nucleoprotein as genetic material.Statement $Y$: Examples include $Euglena$,$Dinoflagellates$,$Amoeba$,and $Paramecium$.

In which organism is a dimorphic nucleus found?

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Statement $X$: Presence of a rigid cell wall and nucleoprotein as genetic material.
Statement $Y$: Examples include $Euglena$,$Dinoflagellates$,$Amoeba$,and $Paramecium$.