During sexual reproduction in angiosperm, the megaspore is produced by

Options

A. Mitosis
B. Meiosis
C. Mitosis followed by meiosis
D. Meiosis followed by mitosis

Answer

To solve the question "During sexual reproduction in angiosperms, the megaspore is produced by," we need to understand the process of megaspore formation in angiosperms. Here’s a step-by-step breakdown of the solution:

### Step 1: Identify the Megaspore Mother Cell
- In angiosperms, the megaspore is produced from a specialized cell known as the megaspore mother cell (also called the megasporangium).

### Step 2: Understand the Process of Megasporogenesis
- The process of forming megaspores from the megaspore mother cell is called megasporogenesis. This process involves cell division.

### Step 3: Determine the Type of Cell Division
- The megaspore mother cell undergoes meiosis, which is a type of cell division that reduces the chromosome number by half. This is essential for producing gametes (in this case, the megaspores).

### Step 4: Conclusion on Megaspore Formation
- After meiosis, the megaspore mother cell produces four haploid megaspores. However, typically, only one of these megaspores survives and develops further.

### Final Answer
- Therefore, the correct answer to the question is that the megaspore is produced by **meiosis**.