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Which of the following statements is correct?    (2021)
  • a)
    Organisms that depend on living plants are called saprophytes.
  • b)
    Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells. 
  • c)
    The fusion of two cells is called Karyogamy.
  • d)
    Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy.
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Which of the following statements is correct? (2021)a)Organisms that ...
  • Some of these organisms can fix atmospheric nitrogen in specialised cells called heterocysts, e.g., Nostoc and Anabaena.
  • Most fungi are heterotrophic and absorb soluble organic matter from dead substrates and hence are called saprophytes.
    (i) Fusion of protoplasms between two motile or non-motile gametes called plasmogamy.
    (ii) Fusion of two nuclei called karyogamy.
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Most Upvoted Answer
Which of the following statements is correct? (2021)a)Organisms that ...
Explanation:
The statement d) is correct. Let's understand the terms mentioned in the options:

a) Saprophytes are the organisms that depend on dead organic matter for their nutrition.

b) Some of the bacteria like Rhizobium and cyanobacteria can fix atmospheric nitrogen in specialized cells called heterocysts.

c) Karyogamy is the fusion of two nuclei during sexual reproduction.

d) Plasmogamy is the fusion of two protoplasms between two motile or non-motile gametes.

So, statement d) is correct as it defines the correct term 'plasmogamy' which is the fusion of two protoplasms between two motile or non-motile gametes.
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Community Answer
Which of the following statements is correct? (2021)a)Organisms that ...
A) false -- saprophytes depends on dead and decaying matter
b) false -- some of the organisms can fix atmospheric nitrogen in specialized cells called heterocysts
c) false -- karyogamy is fusion of nucleus
d trilue -- plasmogamy is fusion of protoplasm

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Which of the following statements is correct? (2021)a)Organisms that depend on living plants are called saprophytes.b)Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells.c)The fusion of two cells is called Karyogamy.d)Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy.Correct answer is option 'D'. Can you explain this answer?
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