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A phenomenon present in some fungi calle...

A phenomenon present in some fungi called Diplanetism is : Option 1 Formation of two different types of thallus in the life cycle Option 2 Formation of two types of successive zoospores in the life cycle Option 3 Fungi existing in two morphological forms Option 4 Completion of life cycle in two hosts

A

Formation of two different types of thallus in the life cycle

B

Formation of two types of successive zoospores in the life cycle

C

Fungi existing in two morphological forms

D

Completion of life cycle in two hosts

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The correct Answer is:
To solve the question regarding the phenomenon called Diplanetism in fungi, we will analyze each option step by step. ### Step-by-Step Solution: 1. **Understanding Diplanetism**: - Diplanetism refers to a specific phenomenon observed in certain fungi where two different types of zoospores are produced during their life cycle. 2. **Analyzing the Options**: - **Option 1**: Formation of two different types of thallus in the life cycle. - This option is incorrect because Diplanetism does not involve the formation of different thalli. - **Option 2**: Formation of two types of successive zoospores in the life cycle. - This option is correct. In the example of the fungus *Saprolegnia*, two types of zoospores are produced: a primary zoospore and a secondary zoospore. The primary zoospore has flagella at the interior end, while the secondary zoospore has laterally inserted flagella. - **Option 3**: Fungi existing in two morphological forms. - This option is incorrect. Diplanetism does not refer to the existence of fungi in two morphological forms. - **Option 4**: Completion of life cycle in two hosts. - This option is also incorrect. Diplanetism does not involve the completion of the life cycle in two different hosts. 3. **Conclusion**: - The correct answer is **Option 2**: Formation of two types of successive zoospores in the life cycle.
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