Plants are large organisms.

Explanation

### Step-by-Step Solution:

1. **Understanding Plant Growth**:
- Plants are characterized by their ability to grow continuously throughout their lifespan. This is in contrast to animals, which typically have a defined growth period.

2. **Role of Meristem**:
- The continuous growth in plants is due to the presence of meristematic tissue. Meristems are regions in plants where active cell division occurs. This means that new cells are constantly being produced, allowing the plant to grow indefinitely.

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