Interfascicular cambium is a

• primary meristematic tissue

• primordial meristem

• type of protoderm

• secondary meristematic tissue

Portion of apical meristem that gives xylem tissue is called

• protoxylem

• procambium

• metaxylem

• tracheid

Interfascicular cambium develops from the cells of

• medullary rays

• xylem parenchyma

• endodermis

• pericycle

Lenticels are involved in

• transpiration

• gaseous exchange

• food transport

• photosynthesis

Age of a tree can be estimated by

• its height and girth

• biomass

• number of annual rings

• diameter of its heartwood

106.

Medullary rays are tissues made up of

• phloem parenchyma

• xylem parenchyma

• sieve tube

• sclerenchyma

A dicotyledonous plant forms crown gall when

• Agrobacterium tumefaciens comes in contact with the plant

• Agrobacterium rhizogenes comes in contact with the plant

• a specific part of DNA from the Ti-plasmid gets integrated with the plant chromosome

• a specific part of DNA from the Ri-plasmid gets integrated with the plant chromosome

Match the following Columns

Column I	Column II
A. Tracheids	1. Cells posses highly thickness walls with obliterates central lumen
B.  Vessels	2. Elongated tube like cells with thick lignified walls and tampering ends
C. Xylem parenchyma	3. Individual members are interconnected through perforations in their common walls
D. Xylem fibres	4. Cells are living with thin cellulosic cell walls.

The correct answer is

• A- 2; B- 3; C- 4; D- 1

• A- 2; B- 4; C- 1; D- 3

• A- 3; B- 2; C- 4; D- 1

• A- 2; B- 3; C- 1; D- 4

If there is more than one tunica layer in stem apex, which among the following is most likely to happen?

• All the layers will develop into epidermal cells

• Only the outer layer will develop into epidermal cells

• All the layers will develop into cortex

• Inner layer develops into cortex

Which of the following region of root is responsible for increase in length of root?

• Root cap region

• Meristematic region

• Region of elongation

• Mature region