Which of the following plants grow by a single “apical cell”

$I.$ Found only in sporophytic phase of life cycle

$II.$ May contain enzymes that are biologically active

$III.$ Often contain strengthening polymers

Select the correct option for cell wall

What is the commercial source of cork ? How is it formed in the plant ?

Trees may be damaged by animals which rub against them, wearing away a strip of bark right around the tree trunk and exposing the xylem. The tree will then

Plants having little or no secondary growth are