Which is not properly matched

Options

A. Exine of pollen grains - Sporopollenin
B. Tapetum - Ubisch bodies
C. Male gametophyte of angiosperms - No prothalial cells
D. Most common type of ovule - Orthotropous.

Answer

To solve the question "Which is not properly matched?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Option 1: Exine of pollen grains is formed of sporopollenin.**
- The exine is indeed the outer layer of pollen grains and is composed of sporopollenin, which is known for its durability and resistance to degradation.
- **Conclusion:** This statement is correctly matched.

2. **Option 2: Tapetum, uvish bodies.**
- The tapetum is the innermost layer surrounding the pollen mother cell and is involved in the nourishment of developing pollen grains. It is indeed associated with uvish bodies.
- **Conclusion:** This statement is also correctly matched.

3. **Option 3: Male gametophyte of angiosperms no prothelial cells.**
- Prothelial cells are associated with gymnosperms, while angiosperms do not have prothelial cells in their male gametophyte.
- **Conclusion:** This statement is correctly matched.

4. **Option 4: Most common type of ovule is Orthotropus.**
- The orthotropous ovule has the micropyle at the top, but the most common type of ovule is actually the anatropous ovule, which is inverted with the micropyle facing downward.
- **Conclusion:** This statement is not correctly matched.

### Final Answer:
The answer to the question "Which is not properly matched?" is **Option 4: Most common type of ovule is Orthotropus.**

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