Which one develops exogenously

Options

A. ascospores
B. basidiospores
C. conidia
D. Both a and b.

Answer

To determine which spores develop exogenously, we need to analyze the options provided in the question. Here’s a step-by-step breakdown:

### Step 1: Understand the term "exogenous"
- Exogenous refers to something that develops or originates from outside. In the context of spores, it means that the spores are produced on the outer surface of a structure.

**Hint:** Remember that "exogenous" relates to external development.

### Step 2: Analyze the first option: Eschospores
- Eschospores are sexual spores found in the group of fungi known as Eschomycetes. They are produced inside a structure called the ascocarp, which is formed from asci. Since eschospores develop internally, they are classified as endogenous.

**Hint:** Look for where the spores are produced—inside or outside.

### Step 3: Analyze the second option: Basidiospores
- Basidiospores are also sexual spores, but they are produced in a different group of fungi called Basidiomycetes. These spores develop on the outer surface of a structure called the basidiocarp. Therefore, basidiospores are exogenous.

**Hint:** Check if the spores are located on the outer surface of the fruiting body.

### Step 4: Analyze the third option: Conidia
- Conidia are asexual spores that develop on specialized branches known as conidiophores. Since conidia are produced on the outside of the conidiophores, they are also classified as exogenous.

**Hint:** Consider whether the spores are produced on specialized structures that are external.

### Step 5: Conclusion
- From the analysis:
- Eschospores are endogenous (develop inside).
- Basidiospores are exogenous (develop outside).
- Conidia are exogenous (develop outside).

Thus, both Basidiospores and Conidia develop exogenously.

**Final Answer:** The correct options that develop exogenously are Basidiospores and Conidia.