Tissues

Tissue Worksheet-22

1. Cells of meristems divide continuously and help in increasing the length and girth of the plant.

2. The cells of meristematic tissue are similar in structure and have thick cellulose cell walls.

3. The meristematic cells are compactly arranged and do not contain any intercellular space between them.

4. According to their position in the plant, meristems are apical, lateral and intercalary.

5. Lateral meristems are situated at the growing tip of stems and roots.

6. Apical meristems are found at apices of the leaves.

Tissue Worksheet-23

21. Simple tissues transport water, mineral salts (nutrients) and food material to various parts of plant body.

22. The main function of xylem is to carry water and mineral salts upward from the root to different parts of shoots.

23. Walls of sieve tubes are perforated.

24. The nucleus of each sieve cell degenerates at maturity, cytoplasm persists in the mature cell.

25. The cells of meristematic tissues have prominent vacuoles and a small nucleus.

26. A single large vacuole is present in the cells of sclerenchyma tissues.