Which of the following statements is incorrect ?

Options

A. Yeast have filamentous bodies with long thread-like hyphae.
B. Morels and truffles are edible delicacies.
C. Claviceps is a source of many alkaloids and LSD
D. Conidia are produced exogenously and ascospores endogenously.

Answer

To determine which statement is incorrect, we will evaluate each option provided in the question.

### Step-by-Step Solution:

1. **Evaluate the First Statement**:
- The first statement claims that certain organisms have filamentous bodies with long thread-like hyphae.
- This statement is incorrect when referring to yeast, as yeast typically exists as single cells and does not produce hyphae.

2. **Evaluate the Second Statement**:
- The second statement mentions that morels and truffles are edible delicacies.
- This statement is correct. Morels and truffles are indeed known for being gourmet foods.

3. **Evaluate the Third Statement**:
- The third statement states that Claviceps is the source of many alkaloids and LSD.
- This statement is also correct. Claviceps, particularly Claviceps purpurea, is known for producing ergot alkaloids, which include LSD.

4. **Evaluate the Fourth Statement**:
- The fourth statement asserts that conidia are produced exogenously and ascospores endogenously.
- This statement is correct. Conidia are asexual spores produced outside the parent organism, while ascospores are produced within a sac-like structure called an ascus.

5. **Conclusion**:
- After evaluating all statements, the first statement is identified as the incorrect one, as yeast does not produce hyphae.

### Final Answer:
The incorrect statement is the first one: "Yeast have filamentous bodies with long thread-like hyphae."

---