The given diagrams show stomatal apparatus in dicots and monocots. Which one is correct option for A, B and C?

Which is the correct option for A, B and C ?

Identify the types of simple tissue indicated by A, B, C and D.

A– Parenchyma, B – Collenchyma, C –Fibre(Sclerenchyma), D – Sclereid (Sclerenchyma)
A– Collenchyma, B – Parenchyma, C– Fibre(Sclerenchyma), D – Sclereid (Sclerenchyma
A– Parenchyma, B –Collenchyma, C – Sclereid(Sclerenchyma), D – Fibre (Sclerenchyma)
A – Collenchyma, B –Parenchyma, C – Sclereid(Sclerenchyma), D – Fibre (Sclerenchyma)

Identified A, B and C of root apex.

Meristematic tissue responsible for increase in girth of tree trunk is

Solution

Lateral meristems are meristems which occur parallel to the circumference of the organs in which they develop.They undergo periclinal divisions producing secondary tissues on the outer and inner sides and increase girth of the plant organs. Examples are vascular cambium and cork-cambium.

Which of the following statements is not true for stomatal apparatus?

Solution

Sometimes, a few epidermal cells in the vicinity of the guard cells become specialised in their shape and size and are known as subsidiary cells or accessory cells.

Interfascicular cambium develops from the cells of :

Solution

At the time of secondary growth interfascicular cambium is formed by parenchymatous medullary rays.Interfascicular cambium along with intrafascicular cambium (formed from cambium cells present between xylem and phloem)constitute continuous cambium ring. If cut off new cells in both directions cause secondary growth in most dicotyledonous plants.

Lenticels are involved in :

Solution

Lenticels are lens shaped openings occurs in stems of most of the woody trees. It permits the exchange of gases between the outer atmosphere and the internal tissue of the stem.

Age of a tree can be estimated by :

Solution

Age of a tree can be estimated by number of annual rings.Annual ring constitute alternate concentric rings of spring wood and autumn wood.

Removal of ring wood of tissue outside the vascular cambium from the tree trunk kills it because

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