NEET · Biology · STD 11 - 3. Plant kingdom

Male gametes are flagellated in

A Ectocarpus
B Spirogyra
C Polysiphonia
D Anabaena.

Verified Solution

Answer & Solution

Correct Answer

(A) Ectocarpus

Step-by-step Solution

Detailed explanation

(a) : Ectocarpus produces biflagellate gametes. Anabaena is a cyanobacteria and does not reproduce sexually. Spirogyra produces nonflagellated male gamete during conjugation, where entire cell content functions as gamete. Polysiphonia also produces non flagellated spermatia.

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.

Same subject

Match the following columns and select the correct option.

Column \(- I\)	Column \(- II\)
\((a)\) Floating Ribs	\((i)\) Located between second and seventh ribs
\((b)\) Acromion	\((ii)\) Head of the Humerus
\((c)\) Scapula	\((iii)\) Clavicle
\((d)\) Glenold cavity	\((iv)\) Do not connect with the sternum

\((a)\quad(b) \quad(c) \quad(d)\)

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