NEET · Biology · STD 11 - 2. Biology classification

Which of the following statements is correct?

A Fusion of two cells is called Karyogamy.
B Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy.
C Organisms that depend on living plants are called saprophytes.
D Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells.

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Answer & Solution

Correct Answer

(B) Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy.

Step-by-step Solution

Detailed explanation

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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Match the following columns and select the correct option

Column \(I\)	Column \(II\)
(\(a\)) Smooth endoplasmic reticulum	(\(i\)) Protein synthesis
(\(b\)) Rough endoplasmic reticulum	(\(ii\)) Lipid synthesis
(\(c\)) Golgi complex	(\(iii\)) Glycosylation
(\(d\)) Centriole	(\(iv\)) Spindle formation

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Column \(I\)	Column \(II\)
(a) Aquaporin	(i) Amide
(b) Asparagine	(ii) Polysaccharide
(c) Abscisic acid	(iii) Polypeptide
(d) Chitin	(iv) Carotenoids