Question

Name the plant tissue which show the following features?
(i) made up of living cells showing thickening: provide mechanical support to the plant.
(ii) made up of dead cells showing thickening: provide mechanical support to the plant; are made of one type of cells.
​(iii) made up of living cells containing green coloured chloroplasts, possesses intercellular space.

Answer 1

(i) Collenchyma tissues are composed of living cells. These tissues are responsible for providing mechanical strength to the aerial parts of the plants.

(ii) Sclerenchyma tissues are formed by dead cells, which help in secondary growth of the plant. These tissues also provide mechanical strength to the plants and generally, a single type of cell is present in these type of tissues.

(iii) Parenchyma tissues consist of loosely packed living cells with large intercellular spaces. Certain parenchyma tissues called chlorenchyma contain chloroplast, which helps in photosynthesis.