Which of these arrangements correctly depicts the comparative sizes of different cells ?

Options

A. Bacteria `gt` red blood cells `gt` ostrich eggs
B. Red blood cells `gt` ostrich eggs `gt` bacteria
C. Ostrich eggs `gt` red blood cells `gt` bacteria
D. Ostrich eggs `gt` bacteria `gt` red blood cells

Answer

To determine which arrangement correctly depicts the comparative sizes of different cells, we need to analyze the sizes of the cells mentioned in the question: bacteria, red blood cells, and ostrich eggs. Here’s the step-by-step solution:

### Step 1: Understand the Sizes of Each Cell Type
- **Bacteria**: The size of bacteria typically ranges from **0.5 to 5.0 micrometers** (µm).
- **Red Blood Cells**: The size of red blood cells is approximately **7 to 8 micrometers** (µm).
- **Ostrich Eggs**: The size of an ostrich egg is about **150 millimeters** (mm), which is equivalent to **150,000 micrometers** (µm).

### Step 2: Compare the Sizes
Now, we can compare the sizes:
- **Bacteria**: 0.5 to 5.0 µm
- **Red Blood Cells**: 7 to 8 µm
- **Ostrich Eggs**: 150,000 µm

From this comparison, we can conclude the following order from smallest to largest:
1. **Bacteria** (smallest)
2. **Red Blood Cells**
3. **Ostrich Eggs** (largest)

### Step 3: Evaluate the Given Options
Now, we will evaluate the options provided in the question:
- **Option 1**: Bacteria, Red Blood Cell, Ostrich Egg (Incorrect)
- **Option 2**: Ostrich Egg, Red Blood Cell, Bacteria (Correct)
- **Option 3**: Ostrich Egg, Bacteria, Red Blood Cell (Incorrect)

### Conclusion
The correct arrangement that depicts the comparative sizes of the different cells is:
**Ostrich Egg > Red Blood Cell > Bacteria**