NEET 2018 · BiologyChrysophytesPrevious Year Question
Select the wrong statement.
Answer: (A) The walls of diatoms are easily destructible. Answer: (A) The walls of diatoms are easily destructible Solution: This is the wrong statement.
- A.The walls of diatoms are easily destructible✓
- B.'Diatomaceous earth' is formed by the cell walls of diatoms
- C.Diatoms are chief producers in the oceans
- D.Diatoms are microscopic and float passively in water
Correct Answer
(A) The walls of diatoms are easily destructible
Solution & Explanation
Answer: (A) The walls of diatoms are easily destructible Solution: This is the wrong statement. Diatom cell walls are embedded with silica, making them indestructible; their accumulated deposits over billions of years form 'diatomaceous earth'. They are microscopic planktonic forms and are the chief producers in the oceans, so the other three statements are correct. NCERT Reference: NCERT Class XI, Biological Classification, p.14, lines 34-35 — "the walls are embedded with silica and thus the walls are indestructible"
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