Angiosperms show

Options

A. Monospory
B. Bispory
C. Trispory
D. Tetraspory.

Explanation

To answer the question "Angiosperms show," we need to analyze the options provided: monospory, bispory, trispory, and tetraspory. Here is a step-by-step solution:

### Step-by-Step Solution:

1. **Understanding Angiosperms**:
- Angiosperms are known as flowering plants and are the most advanced group of plants in the plant kingdom.

2. **Embryo Sac Formation**:
- In angiosperms, the embryo sac is formed through a process called megasporogenesis, leading to the formation of the embryo sac.

3. **Type of Embryo Sac**:
- The embryo sac in angiosperms is of the polygonum type. This means it has a specific structure and number of nuclei and cells.

4. **Composition of the Embryo Sac**:
- The polygonum type embryo sac consists of 8 nuclei and 7 cells.
- Specifically, there is 1 central cell (which contains 2 polar nuclei), 3 antipodal cells at the chalazal end, 2 synergid cells, and 1 egg cell at the micropilar end.

5. **Determining the Type of Spory**:
- Since the embryo sac is formed from a single megaspore, this indicates that angiosperms exhibit monospory.

6. **Conclusion**:
- Therefore, the correct answer to the question "Angiosperms show" is **monospory**.

### Final Answer:
Angiosperms show **monospory**.