Tetrad of megaspores is generally

Options

A. Tetrahedral
B. Linear
C. Decussate
D. Isobilateral.

Answer

To solve the question regarding the arrangement of megaspores, we will follow these steps:

### Step 1: Understand the Process of Megasporogenesis
The megaspore mother cell (megasporangium) undergoes meiosis to produce megaspores. This process is known as megasporogenesis.

**Hint:** Remember that meiosis is a type of cell division that reduces the chromosome number by half, resulting in haploid cells.

### Step 2: Formation of Megaspores
During meiosis, the megaspore mother cell divides to form four haploid megaspores. These are the cells that will eventually develop into the female gametophyte.

**Hint:** Focus on the fact that meiosis results in four cells from one mother cell.

### Step 3: Arrangement of Megaspores
The four haploid megaspores are arranged in a specific pattern. In the case of megaspores, they are typically arranged in a linear fashion, forming what is known as a linear tetrad.

**Hint:** Visualize how four cells can be arranged in a straight line to form a tetrad.

### Step 4: Distinguish Between Types of Tetrads
It is important to note that other types of tetrads, such as tetrahedral, decussate, and isobilateral, are associated with microspores, not megaspores. This distinction is crucial for answering the question correctly.

**Hint:** Recall that microspores and megaspores have different arrangements and characteristics.

### Step 5: Conclusion
Based on the information gathered, we conclude that the tetrad of megaspores is generally linear.

**Hint:** Summarize the key points to reinforce the understanding that the arrangement of megaspores is linear.

### Final Answer
The tetrad of megaspores is generally linear.