For a critical studyof secondary growth in plants, which one of the following pairs is suitable ?
Teak and pine
Deodar and fern
Wheat and maiden hair fern
Sugarcane and sunflower
Cavity or a gland formed by the separation is
Root cap is absent in
Companion cells in plants are associated with
Plant tissues are divided into meristematic and permanent tissues on which of the following basis?
Stomatal apparatus consists of