Chapter 22, Introduction to Plants - Assessment - 22.2 Seedless Plants - Understand Key Concepts/Think Critically - Page 658: 14

In the absence of lignin, cell walls cannot become hard and support the plant body. Hence the plant cannot grow tall. Moreover, this deficiency also leads to the absence of vascular tissues needed for transport of water and other nutrients.

In the absence of lignin, cell walls cannot become hard and support the plant body. Hence the plant cannot grow tall. Moreover, this deficiency also leads to the absence of vascular tissues needed for transport of water and other nutrients.