Tissue Worksheet-2

Tissue Worksheet-2

Fill in the blanks:

21. Parenchyma serves as ______ storage tissue.

22. If air cavities are present, the parenchyma tissue is called ______.

23. ______ shows many of the features of parenchyma but is characterised by the deposition of extra cellulose at the corners of the cells

24. In ______ of simple plant tissue, intercellular spaces are generally absent.

25. Collenchyma is ______ in monocot stems, roots and leaves.

26. Collenchyma is a ______ tissue.

27. ______ provides mechanical support and elasticity.

28. ______ allows easy bending in various parts of a plant (leaf, stem) without actually breaking it.

29. The walls of cells of ______ are greatly thickened with deposition of lignin.

30. The cell wall of plant cell when thickened with lignin is called ______.

31. ______ of sclerenchyma are usually pointed at both ends and are clustered into strands.

32. ______ of sclerenchyma are irregular-shaped.

33. Sclereids are also called as ______.

34. ______ gives strength, rigidity, flexibility and elasticity to the plant body.

35. ______ enables plant body to withstand various strains.

36. The ______ tissues consist of more than one type of cells.

37. Xylem and ______ is a vascular and mechanical tissue.

38. Except ______, all other xylem elements are dead.

39. ______ of xylem are very long tube–like structures formed by a row of cells placed end to end.

40. ______ of xylem are elongated cells with tapering ends.

Answer:

21. Food

22. Aerenchyma

23. Collenchyma

24. Collenchyma

25. Absent

26. Mechanical

27. Collenchyma

28. Collenchyma

29. Sclerenchyma

30. Lignified

31. Fibres

32. Sclereids

33. grit cells or stone cells

34. Sclerenchyma

35. Sclerenchyma

36. Complex

37. Phloem

38. Xylem parenchyma

39. Vessels

40. Trachieds