The majority of angiosperms show the following feature

Options

A. Have monosporic embryo sac
B. Show pollen dispersal at three called stage
C. Have ovule with micropyl,chalaza and funicle in straight line
D. Show hydrophily

Answer

To answer the question regarding the features of angiosperms, we will break down the information step by step.

### Step-by-Step Solution:

1. **Definition of Angiosperms**:
- Angiosperms are flowering plants that produce flowers as their sexual reproductive structures. They are characterized by the presence of seeds enclosed within a fruit.

**Hint**: Remember that angiosperms are known for their flowers and seeds.

2. **Embryo Sac Formation**:
- In angiosperms, the embryo sac is formed from a single megaspore. This is referred to as a monosporic embryo sac.

**Hint**: Focus on the term "monosporic" which indicates the development from a single megaspore.

3. **Megaspore Development**:
- Within the ovule, a cell from the nucellus differentiates into the megaspore mother cell (diploid). This cell undergoes meiosis to produce four megaspores, out of which three degenerate, leaving one functional megaspore.

**Hint**: Remember that meiosis leads to the formation of four megaspores, but only one survives.

4. **Mitotic Division of Megaspore**:
- The surviving megaspore undergoes mitotic divisions to form a multi-nucleate structure. It first becomes two nucleate, then four nucleate, and finally eight nucleate before the cell walls form, creating the embryo sac.

**Hint**: The process involves mitosis, leading to an increase in the number of nuclei.

5. **Characteristics of the Embryo Sac**:
- The embryo sac that develops from the single megaspore is a defining characteristic of angiosperms, confirming that they predominantly exhibit a monosporic embryo sac.

**Hint**: The key takeaway is that the embryo sac in angiosperms is derived from one megaspore.

6. **Evaluation of Other Options**:
- The question presents multiple options regarding features of angiosperms. We can evaluate each:
- **Pollen Dispersal**: Most angiosperms disperse pollen at the 2-cell stage, not the 3-cell stage.
- **Ovule Structure**: The arrangement of micropyle, chalazal, and funicle is not linear; they have specific orientations.
- **Pollination Mechanism**: Majority of angiosperms are pollinated by biotic agents (like insects), not hydrophily (water).

**Hint**: Cross-check each option against the known characteristics of angiosperms.

7. **Conclusion**:
- The only correct feature that applies to the majority of angiosperms is the presence of a monosporic embryo sac.

**Hint**: Always summarize your findings to reinforce the correct answer.

### Final Answer:
The majority of angiosperms show the feature of having a monosporic embryo sac.