Q. No.Consider the following statements regarding aerial modifications of stem:
I. Tendrils help plants to climb as seen in passion flower and Vitis
II. Axilary and Terminal buds are modified into thorns in lemon, pomegranate and karonda
III. Prickles develop superficially at the surface of the stem and are distributed irregularly as in rose and plum
Of the given statements, correct are:
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
Difficulty Level:
Match aerial modifications of stem given in column I with their descriptions in column II and choose your answer from the codes given below:
|
A |
Phylloclade |
P |
Green, flattened or cylindrical branches of unlimited growth |
|
B |
Cladode |
Q |
Branches of limited growth that become green and flat like a leaf |
|
C |
Bulbil |
R |
Modified vegetative bud with stored food meant for reproduction |
Codes:
|
|
A |
B |
C |
|
1. |
P |
Q |
R |
|
2. |
P |
R |
Q |
|
3. |
R |
P |
Q |
|
4 . |
Q |
R |
P |
Difficulty Level:
In racemose type of branching:
1. Branches continue to grow indefinitely and give off further branches laterally in a basipetal order
2. Branches continue to grow indefinitely and give off further branches laterally in an acropetal order
3. Branches stop growing after some time and give off further branches laterally in a basipetal order
4. Branches stop growing after some time and give off further branches laterally in an acropetal order
Difficulty Level:
In Australian Acacia, the petiole or any part of rachis becomes flattened taking the shape of a leaf and turning green in color. This structure is called as:
(1) Phylloclade
(2) Cladode
(3) Phyllode
(4) bulbil
Difficulty Level:
In the ray florets of sunflower, the condition of the flower is termed as:
(1) Superior
(2) Inferior
(3) Epigynous
(4) Hypogynous
Difficulty Level:
China rose is not characterized by:
(1) Axile placentation
(2) Valvate aestivation
(3) Monoadelphous stamen
(4) Superior ovary
Difficulty Level:
The given floral formula describes:
(1) Asparagus
(2) Belladona
(3) Indigofera
(4) Mustard
Difficulty Level:
In vexillary aestivation:
1. The standard overlaps the wings
2. The standard overlaps the keel
3. The standard is overlapped by keel
4. The keel overlap the wings
Difficulty Level:
Which of the following would not be a character of Asparagus?
1. Actinomorphic flower
2. Imbricate aestivation
3. Superior ovary
4. Endospermous seed
Difficulty Level:
The cells of which of the following regions of the root are responsible for growth of its length?
1. Root cap
2. Region of meristematic activity
3. Region of elongation
4. Region of maturation
Difficulty Level:
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