How many statements are correct ?
(a) Deuteromycetes are also known as imperfect fungi because only vegetative or asexual phases of these fungi are known
(b) A large number of members of deuteromycetes are decomposer of litter
(c) In club fungi stage between dikaryotization and karyogamy is usually prolonged
(d) Some members of phycomycetes are obligate parasite on plants

Options

A. One
B. Three
C. Two
D. Four

Answer

To determine how many statements are correct, we will evaluate each statement one by one.

### Step-by-Step Solution:

1. **Statement (a)**: "Deuteromycetes are also known as imperfect fungi because only vegetative or asexual phases of these fungi are known."
- **Evaluation**: This statement is true. Deuteromycetes, also referred to as imperfect fungi, are characterized by the absence of a known sexual reproductive stage. They primarily reproduce asexually.

2. **Statement (b)**: "A large number of members of deuteromycetes are decomposers of litter."
- **Evaluation**: This statement is also true. Many deuteromycetes play a significant role in the ecosystem as decomposers, breaking down organic matter and contributing to nutrient cycling.

3. **Statement (c)**: "In club fungi, the stage between dikaryotization and karyogamy is usually prolonged."
- **Evaluation**: This statement is true. In club fungi (Basidiomycetes), the dikaryotic stage (where two haploid nuclei coexist without fusing) is indeed prolonged before karyogamy (the fusion of nuclei) occurs.

4. **Statement (d)**: "Some members of phycomycetes are obligate parasites on plants."
- **Evaluation**: This statement is true. Some phycomycetes are known to be obligate parasites, meaning they require a host plant to complete their life cycle.

### Conclusion:
All four statements (a, b, c, and d) are correct. Therefore, the answer is that **4 statements are correct**.

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