Opening and closing of stomata is a function of

1. Cuticle

2. Guard cell

3. Waxy layer

4. Xylem

The vascular system in plant consist of

In dicotyledonous stem _________ is present between phloem and xylem.

Trichomes help in

The presence of cambium possess the ability to form secondary xylem and phloem tissue and hence are called

In plant stem the epidermal hairs are called

In leaves the ground tissue consist of thin walled chloroplast containing cells and is called____.

Transpirational rate is controlled by

The stomatal aperture, guard cell and the surrounding subsidiary cells are together called________.

All tissue except ____________ constitute the ground tissue.