NTA Abhyas NEET2020BotanyBiological ClassificationPractice
Select the incorrect statement from the following.
Options
- ADiatoms are microscopic and float passively in water.
- B'Diatomaceous earth' is formed by the cell walls of diatoms, which got deposited in ocean beds.
- CDiatoms are chief producers in the oceans.
- DThe walls of diatoms are easily destructible.
Correct answer
D. The walls of diatoms are easily destructible.
Step-by-step solution
Diatoms are marine or freshwater unicellular organisms which have cell walls (frustules) composed of pectin impregnated with silica and consisting of two halves, one overlapping the other. The siliceous frustules of atoms do not decay easily, and siliceous frustules of dead diatoms gets preserved forming Diatomaceous earth.