Choose the incorrect statement about phycomycetes.

Options

A. Members are found in aquatic habitats.
B. Spores are endogenously produced in sporangium.
C. A zygospore is formed by reduction division.
D. They show all type of syngamy.

Answer

To solve the question "Choose the incorrect statement about phycomycetes," we need to analyze each of the provided statements about phycomycetes and determine which one is incorrect.

### Step-by-Step Solution:

1. **Understanding Phycomycetes**:
- Phycomycetes is an outdated classification that generally refers to certain fungi, particularly those with aseptate (coenocytic) hyphae. This group includes fungi like zygomycetes and trichomycetes.

2. **Analyzing the Statements**:
- **Statement 1**: "Members are found in aquatic habitats."
- This statement is **correct**. Phycomycetes are commonly found in aquatic environments as well as on decaying organic matter.

- **Statement 2**: "Spores are endogenously produced in spore enzyme."
- This statement is **correct**. In phycomycetes, spores (like zoospores) are produced endogenously within sporangia.

- **Statement 3**: "A zygospore is formed by reduction division."
- This statement is **incorrect**. A zygospore is formed by the fusion of two gametes (syngamy), and it undergoes meiosis to produce spores afterward, not during its formation.

- **Statement 4**: "They show all types of syngamy."
- This statement is **correct**. Phycomycetes can exhibit various forms of syngamy, including isogamy, anisogamy, and oogamy.

3. **Identifying the Incorrect Statement**:
- Based on the analysis, the incorrect statement is **Statement 3**: "A zygospore is formed by reduction division."

### Conclusion:
The incorrect statement about phycomycetes is that "A zygospore is formed by reduction division." Therefore, the answer is **option C**.

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