NTA Abhyas NEET2020BotanyBiological ClassificationPractice
Find the incorrect statement from the following.
Options
- AMajority of Euglenoids are fresh water organisms found in stagnant water.
- BSlime moulds are saprophytic protists.
- CIn diatoms, the cell walls form two thin non-overlapping shells, which fit together as in a soap box.
- DDinoflagellates are mostly marine and photosynthetic.
Correct answer
C. In diatoms, the cell walls form two thin non-overlapping shells, which fit together as in a soap box.
Step-by-step solution
In diatoms, the cell walls form two thin overlapping shells, which fit together as in a soap box. The walls are embedded with silica and thus the walls are indestructible. Thus, diatoms have left behind large amount of cell wall deposits in their habitat; this accumulation over billions of years is referred to as ‘diatomaceous earth’.