Select the mismatch

Options

A. Pinus-Dioecious
B. Cycas-Dioecious
C. Salvinia-Heterosporous
D. Equisetum-Homosporous.

Answer

To solve the question "Select the mismatch," we will analyze each option provided and determine if it is correctly matched or not.

### Step-by-Step Solution:

1. **Understand the Terms:**
- **Dioecious:** Refers to plants that have male and female reproductive organs on separate individuals.
- **Monocious:** Refers to plants that have both male and female reproductive organs on the same individual.
- **Heterosporous:** Refers to plants that produce two different types of spores (megaspores and microspores).
- **Homosporous:** Refers to plants that produce only one type of spore.

2. **Analyze Each Option:**
- **Pinus, Dioecious:** Pinus is a gymnosperm that is actually **monocious** (not dioecious). This is a mismatch.
- **Cycus, Dioecious:** Cycus is indeed **dioecious** as it has separate male and female plants. This is a correct match.
- **Salvinia, Heterosporous:** Salvinia produces two types of spores (megaspores and microspores), making it **heterosporous**. This is a correct match.
- **Equisetum, Homosporous:** Equisetum produces only one type of spore, making it **homosporous**. This is a correct match.

3. **Identify the Mismatch:**
- The only mismatch found is **Pinus, Dioecious**. Pinus is not dioecious; it is monocious.

### Conclusion:
The mismatch is **Pinus, Dioecious**.

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