Shape of the cell may vary depending on
(a) Mode of nutrition
(b) Type of nucleus
(c) The volume of cytoplasm
(d) Function they perform

Options

A. Mode of nutrition
B. Type of nucleus
C. The volume of cytoplasm
D. Function they perform

Answer

To determine the correct answer to the question regarding the variability of cell shape, we can analyze each option step by step:

### Step 1: Understand the Question
The question asks about the factors that can influence the shape of a cell. Cells can have various shapes based on different characteristics or functions.

### Step 2: Analyze Each Option
- **Option (a): Mode of nutrition**
- While the mode of nutrition can influence certain aspects of a cell, it is not the primary factor determining cell shape. For example, plant cells and animal cells have different nutritional modes but can have similar shapes.

- **Option (b): Type of nucleus**
- The type of nucleus (e.g., prokaryotic vs. eukaryotic) does not directly affect the shape of the cell. Cells with different types of nuclei can still have similar shapes.

- **Option (c): Volume of cytoplasm**
- The volume of cytoplasm can influence cell size but not necessarily the shape. Cells with varying cytoplasmic volumes can still maintain similar shapes.

- **Option (d): Function they perform**
- This option is the most relevant. The shape of a cell is often adapted to its specific function. For example, nerve cells are long and thin to transmit signals efficiently, while red blood cells are disc-shaped to maximize surface area for oxygen transport.

### Step 3: Conclusion
Based on the analysis, the correct answer is **(d) Function they perform**. The shape of the cell varies primarily depending on the specific functions that the cell is designed to carry out.