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How many statements are correct w.r.t crysophytes?
(1) They are found in marine environment, fresh water organisms are very rare.
(2) In diatoms, the cell walls form two thick overlapping shells which fit together as in a soap box.
(3) The cell membranes of diatoms are embedded with silica and accumulation of them over billions of years is referred to as "diatomaceous earth".
(4) Being brittle and slippery  diatomaceous soil is used in polishing, filtration of oils and syrups.
(5) Diatoms are the chief "Producers" in the oceans.
  • a)
    1
  • b)
    2
  • c)
    3
  • d)
    All of the above 
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
How many statements are correct w.r.t crysophytes?(1) They are found i...
Diatoms are found in the fresh water as well as in the marine environment. The cell walls of diatoms form two thin overlapping shells which fit together as in a soap box. The cell wall of is embedded with silica and accumulation of them over billion years is referred to as "diatomaceous earth". Being gritty and less slippery, this soil is used in polishing, filtration of oil and syrups. 
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Most Upvoted Answer
How many statements are correct w.r.t crysophytes?(1) They are found i...
Correct statements about crysophytes:

1. They are found in marine environment, fresh water organisms are very rare.

Correct statements about diatoms:

2. In diatoms, the cell walls form two thick overlapping shells which fit together as in a soap box.
3. The cell membranes of diatoms are embedded with silica and accumulation of them over billions of years is referred to as diatomaceous earth.
4. Being brittle and slippery diatomaceous soil is used in polishing, filtration of oils and syrups.

Incorrect statement:

5. Diatoms are the chief Producers in the oceans. (This statement is not true as diatoms are one of the important producers in the oceans, but not the chief producers.)

Therefore, only statement 1 is correct with respect to crysophytes and statements 2, 3, and 4 are correct with respect to diatoms. The correct option is A.
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Community Answer
How many statements are correct w.r.t crysophytes?(1) They are found i...
Answer is option a, because only statement 5 is correct. They are marine as well as fresh water protist. The cell wall form two thin(not thick) overlapping shells. The cell walls(not membranes) of diatoms are embedded with silica. And in statement 4, being gritty not for being brittle the soil is used in polishing.
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How many statements are correct w.r.t crysophytes?(1) They are found in marine environment, fresh water organisms are very rare.(2) In diatoms, the cell walls form two thick overlapping shells which fit together as in a soap box.(3) The cell membranes of diatoms are embedded with silica and accumulation of them over billions of years is referred to as "diatomaceous earth".(4) Being brittle and slippery diatomaceous soil is used in polishing, filtration of oils and syrups.(5) Diatoms are the chief "Producers" in the oceans.a)1b)2c)3d)All of the aboveCorrect answer is option 'A'. Can you explain this answer?
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