Which type of tissue consists of embryonic or undifferentiated cells capable of active division?

Meristem tissue is fundamental in plant growth as it contains undifferentiated cells that have the ability to divide actively. This tissue is crucial for the growth of new leaves, stems, and roots, allowing plants to grow throughout their lifetimes. Meristems are typically found at the tips of shoots and roots (apical meristems) or in specific regions throughout the plant (lateral meristems).

The unique capacity for continual division distinguishes meristematic tissue from permanent tissues like parenchyma, collenchyma, and sclerenchyma, which are primarily made up of differentiated cells that have taken on specific roles in the plant's structure and function. Parenchyma typically serves in storage, photosynthesis, and tissue repair, collenchyma provides flexible support mainly in young shoots, and sclerenchyma consists of rigid cells that provide strength and support.