Choose the incorrect pair

Options

A. Sphagnum - Peat Moss
B. Riccia - Liverworts
C. Cycas - Largest ovule
D. Pinus - Homosporous

Answer

To solve the question of identifying the incorrect pair, we will analyze each option provided and determine whether the descriptions match the organisms listed.

### Step-by-Step Solution:

1. **Identify the Organisms and Their Classifications:**
- The question provides a list of organisms and asks us to identify incorrect pairs.

2. **Examine the First Option: Sphagnum**
- Sphagnum is a member of the bryophyte category and is commonly known as bog moss or peat moss.
- **Conclusion:** This pair is correct.

3. **Examine the Second Option: Riccia**
- Riccia is also a bryophyte and is classified under liverworts, which are a type of bryophyte.
- **Conclusion:** This pair is correct.

4. **Examine the Third Option: Cycadophyta**
- Cycadophyta refers to a group of gymnosperms, specifically cycads. The mention of "Psycothoracy" seems to be a misinterpretation; however, cycads do produce large ovules, and they are indeed gymnosperms.
- **Conclusion:** This pair is correct, although the terminology used may be confusing.

5. **Examine the Fourth Option: Pinus**
- Pinus is a genus of gymnosperms and is known to produce two types of spores: microspores and megaspores. This means that Pinus is heterosporous, not homosporous as stated in the option.
- **Conclusion:** This pair is incorrect because it incorrectly identifies Pinus as homosporous.

### Final Answer:
The incorrect pair is the fourth option regarding Pinus, as it is heterosporous, not homosporous.

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