The conidia are borne on sterigmata which are in turn borne by

Options

A. Rami
B. Metulae
C. Phialides
D. Conidiophores

Answer

To solve the question "The conidia are borne on sterigmata which are in turn borne by," we will follow these steps:

### Step 1: Understand the Terminology
- **Conidia**: These are asexual spores produced by fungi, specifically in the group known as Ascomycetes.
- **Sterigmata**: These are the structures that bear conidia.
- **Conidiophores**: These are specialized hyphal structures that produce conidia.

### Step 2: Identify the Relationship
- Conidia are produced on sterigmata.
- Sterigmata are located on conidiophores.

### Step 3: Analyze the Options
The options provided are:
1. Rami
2. Medullae
3. Phyllites
4. Conidiophores

### Step 4: Determine the Correct Answer
- Since we know that conidia are borne on sterigmata, and sterigmata are borne by conidiophores, the correct answer is **conidiophores**.

### Step 5: Confirm the Hierarchical Structure
- Conidiophores branch out to form rami, which can further branch into metulae (or ramulae), and finally, sterigmata arise from metulae where conidia are produced.

### Final Answer
The conidia are borne on sterigmata which are in turn borne by **conidiophores**.

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