Q. No.A common structural feature of vessel elements and sieve tube elements is :-
1. thick secondary walls
2. pores on lateral walls
3. presence of P-protein
4. enucleate condition
If the stoma remains surrounded by a limited number of cells which cannot be
distinguished from other epidermal cells, then this type of stomata is known as.
1. perigynous type
2. paracytic type
3. anisocytic type
4. anomocytic type
In the given diagram of section of root of maize, different parts have been indicated by
alphabets. Choose the answer in which these alphabets have been correctly matched
with the parts which they indicate.
1. A = Phloem, B = Xylem, C = Cortex, D = Endodermis, E = Pith, F = Root hair, G =
Epidermis
2. A = Pith, B = Root hair, C = Epiblema, D = Cortex, E = Endodermis, F = Phloem, G
= Xylem
3. A = Root hair, B = Epiblema, C = Cortex, D = Endodermis, E = Pith, F = Xylem, G
= Phloem
4. A = Epiblema, B = Root hair, C = Vascular bundle, D = Cortex, E = Phloem, F =
Xylem, G = Pith
Fascicular cambium separates the xylem and phloem in:-
1. only dicots
2. only monocots
3. both dicots and monocots
4. none of the above.
In a dicotyledonous stem, the sequence of tissues from the outside to the inside is
(1) phellem – pericycle – endodermis – phloem
(2) phellem – phloem – endodermis – pericycle
(3) phellem – endodermis – pericycle – phloem
(4) pericycle – phellem – endodermis – phloem
The quiescent centre in root meristem serves as:-
1. site for storage of food which is utilized during maturation
2. reservoir of growth hormones
3. reserve for replenishment of damaged cells of the meristem
4. region for absorption of water
The sugarcane plant has:-
1. dumb-bell shaped guard cells
2. pentamerous flowers
3. reticulate venation
4. capsular fruits
In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through.
(1) aerenchyma
(2) trichomes
(3) pneumatophores
(4) lenticels
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