Which of the following statements is true? |
|
a) |
The collenchyma occurs in layers below the epidermis in monocotyledonous plants |
b) |
Sclerenchyma cells are usually dead and without protoplasts |
c) |
Xylem parenchyma cells are living and thin-walled and their cell walls are made up of lignin |
d) |
The companion cells are specialised sclerenchymatous cells |
Which of the following statements is true? |
|
a) |
The collenchyma occurs in layers below the epidermis in monocotyledonous plants |
b) |
Sclerenchyma cells are usually dead and without protoplasts |
c) |
Xylem parenchyma cells are living and thin-walled and their cell walls are made up of lignin |
d) |
The companion cells are specialised sclerenchymatous cells |
(b) Sclerenchyma are considered thick-walled lignified supportive tissue characterised by the absence of living protoplast. Their principal function is to provide mechanical support. |