Read the following statements and select the incorrect statement :-

Options

A. The colonies of cyanobacteria are generally surrounded by gelatinous sheath
B. The cyanobacteria are unicellular, colonial or filamentous, freshwater/marine or terrestrial.
C. Rhizopus belongs to class phycomycetes of kingdom fungi
D. Bacteria are grouped under two categories only based on their shape

Answer

To solve the question, we need to analyze each statement provided and identify which one is incorrect.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- The first statement claims that "the colonies of cyanobacteria are generally surrounded by a gelatinous sheath."
- This statement is **correct**. Cyanobacteria do form colonies and are indeed surrounded by a gelatinous sheath.

2. **Analyze the Second Statement:**
- The second statement mentions that "cyanobacteria can be unicellular, colonial, filamentous, and found in freshwater, marine, and terrestrial environments."
- This statement is also **correct**. Cyanobacteria exist in various forms and habitats.

3. **Analyze the Third Statement:**
- The third statement states that "rhizopus belongs to class zygomycetes of kingdom fungi."
- This statement is **incorrect**. Rhizopus is a genus of fungi that belongs to the class Zygomycetes, but the statement incorrectly states "pycomicities," which is not a recognized class in fungi.

4. **Analyze the Fourth Statement:**
- The fourth statement claims that "bacteria are grouped under two categories based only on their shape."
- This statement is **incorrect** as well. While bacteria can be classified based on shape (cocci, bacilli, spirilla), they are also classified based on other characteristics such as Gram staining, metabolic activity, and genetic analysis.

### Conclusion:
The incorrect statements are the third and fourth ones. However, since the question asks for a single incorrect statement, the third statement regarding Rhizopus is the most clear-cut incorrect statement.

### Final Answer:
The incorrect statement is: "Rhizopus belongs to class pycomicities of kingdom fungi."

---