The largest cell among the following is

Options

A. cell the morula.
B. cell of the blastula
C. cell of the gastrula.
D. zygote.

Answer

To solve the question regarding which is the largest cell among the given options, we can analyze each option step by step.

### Step 1: Analyze the first option - Morula
- The morula stage consists of a solid ball of cells formed after several rounds of cell division (cleavage) of the zygote. It typically contains around 16 to 32 cells.
- **Conclusion**: The morula is not the largest cell.

**Hint**: Remember that the morula is an early stage of development and consists of multiple cells.

### Step 2: Analyze the second option - Blastula
- The blastula is a stage that follows the morula and consists of a hollow sphere of cells. It usually contains around 128 cells.
- **Conclusion**: The blastula is also not the largest cell.

**Hint**: The blastula is larger than the morula in terms of cell number, but it is still composed of many smaller cells.

### Step 3: Analyze the third option - Gastrula
- The gastrula is formed after the blastula and is characterized by the formation of three germ layers (ectoderm, mesoderm, endoderm). It is an early multicellular embryo but still consists of multiple cells.
- **Conclusion**: The gastrula is not a single large cell.

**Hint**: The gastrula represents a more complex structure but is still made up of multiple cells.

### Step 4: Analyze the fourth option - Zygote
- The zygote is the fertilized egg and is the first cell of a new organism. It is a single cell and is typically larger than the cells that make up the morula, blastula, and gastrula stages.
- **Conclusion**: The zygote is indeed the largest cell among the options provided.

**Hint**: The zygote is a single cell that is larger than the individual cells in the later stages of development.

### Final Answer
The largest cell among the options given is the **Zygote** (Option 4).