Growth occurs due to synthesis of

Options

A. Protoplasmic substance
B. Apoplasmic substances
C. Both A and B
D. None of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Growth**: Growth is defined as an irreversible and permanent increase in the size of an organ. This increase can occur due to the development of substances both inside and outside the cells of the organ.

2. **Parameters of Growth**: Growth can be measured through various parameters depending on the organ in question. For example:
- The growth of a leaf is measured by its surface area.
- The growth of fruits is measured by their volume.
- The growth of a pollen tube or stem is measured by its length.

3. **Role of Protoplasm**: Protoplasm refers to the living substance within a cell. The growth of any organ is fundamentally due to the growth of its cells, which is influenced by the synthesis of protoplasmic substances. As protoplasmic substances increase, the cell size increases, leading to the growth of tissues and ultimately the organ.

4. **Apoplasmic Growth**: In addition to protoplasmic growth, there is also apoplasmic growth. This refers to the deposition of substances in the intercellular spaces (the space between cells). This contributes to the overall growth of the organ as well.

5. **Conclusion**: Therefore, growth occurs due to the synthesis of both protoplasmic substances (inside the cell) and apoplasmic substances (outside the cell). Thus, both types of growth are essential for the overall increase in size of an organ.

6. **Correct Answer**: Based on the explanation, the correct answer is that growth occurs due to the synthesis of both protoplasmic and apoplasmic substances.

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