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Select the CORRECT statements. (I) In ...

Select the CORRECT statements.
(I) In Volvox, sexual reproduction involves the fusion of one large , static male gemete and a smaller motile female gamete.
(II) In spirogyra , fusing gametes are non-flagellated and dissimilar in size.
(III) In Ulorthrix , fusing gametes are flagellated and similar in size .
(IV) In. Fucus, the female gamete is large and non-motile whereas male gamete is small and motile .

A

I, III

B

II, III

C

III, IV

D

I, II

Text Solution

AI Generated Solution

The correct Answer is:
To determine which statements are correct, let's analyze each one step by step. ### Step 1: Analyze Statement I **Statement I:** In Volvox, sexual reproduction involves the fusion of one large static male gamete and a smaller motile female gamete. - **Analysis:** This statement is incorrect. In Volvox, the male gamete is small and motile, while the female gamete is larger and non-motile. Therefore, the statement is false. ### Step 2: Analyze Statement II **Statement II:** In Spirogyra, fusing gametes are non-flagellated and dissimilar in size. - **Analysis:** This statement is also incorrect. Spirogyra produces isogametes, which means the gametes are similar in size and morphology. Thus, this statement is false. ### Step 3: Analyze Statement III **Statement III:** In Ulothrix, fusing gametes are flagellated and similar in size. - **Analysis:** This statement is correct. Ulothrix produces isogametes, which are flagellated and similar in size. Therefore, this statement is true. ### Step 4: Analyze Statement IV **Statement IV:** In Fucus, the female gamete is large and non-motile whereas the male gamete is small and motile. - **Analysis:** This statement is correct. Fucus exhibits oogamy, where the female gamete is indeed large and non-motile, while the male gamete is small and motile. Therefore, this statement is true. ### Conclusion The correct statements are: - Statement III: In Ulothrix, fusing gametes are flagellated and similar in size. - Statement IV: In Fucus, the female gamete is large and non-motile whereas the male gamete is small and motile. ### Final Answer The correct statements are **III and IV**. ---
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