Here's a breakdown:
* Meristematic cells are undifferentiated cells, meaning they haven't specialized into a particular type of cell yet. They have the ability to divide repeatedly, producing new cells that can then differentiate into various plant tissues.
* Two main types of meristems contribute to plant growth:
* Apical meristems: Found at the tips of roots and shoots, they are responsible for primary growth, which increases the length of the plant.
* Lateral meristems: Located in the vascular cambium and cork cambium, they are responsible for secondary growth, which increases the girth of the plant (e.g., thickening stems and roots).
Key takeaway: Meristematic cells are like the "growth factories" of plants, continuously producing new cells for both extending the plant's length and increasing its width.
