Q. No.Match each item in Column I with one in Column II and select the correct option from the codes given below:
COLUMN I [Phyllotaxy]
COLUMN II [Example]
A.
Alternate
a.
China rose
B.
Opposite
b.
Calotropis
C.
Whorled
c.
Alstonia
Codes:
A
B
C
1.
a
b
c
2.
a
c
b
3.
b
a
c
4.
c
b
a
The stems of maize and sugarcane have:
| 1. | stilt roots that are hanging and supporting structures |
| 2. | prop roots that are hanging and supporting structures |
| 3. | prop roots coming out from the nodes in upper stem |
| 4. | supporting stilt roots coming out of the lower nodes of the stem |
Identify the incorrectly matched pair:
|
Aestivation type |
Example |
|
|
1. |
Valvate |
Calotropis |
|
2. |
Twisted |
Bean |
|
3. |
Imbricate |
Gulmohur |
|
4. |
Vexillary |
Pea |
What is not true for a stem in a flowering plant in general?
| 1. | Negatively geotropic |
| 2. | Develops from plumule of the germinating embryo |
| 3. | Absence of terminal and axillary buds |
| 4. | Spreads out branches bearing leaves, flowers and fruits |
Stem tendrils are present in all the following except:
| 1. Citrus | 2. Watermelon |
| 3. Cucumber | 4. Grapevines |
Match each item in Column I regarding structure of a dicotyledonous seed with description in Column II and select the correct option from the codes given below:
|
|
Column I |
|
Column II |
|
A. |
Testa |
a. |
Outer layer of seed coat |
|
B. |
Tegmen |
b. |
Inner layer of seed coat |
|
C. |
Hilum |
c. |
Scar on seed coat through which the developing seeds were attached to the fruit |
|
D. |
Micropyle |
d. |
Small pore through which pollen tube penetrates |
Codes
| A | B | C | D | |
| 1. | a | b | c | d |
| 2. | b | a | c | d |
| 3. | b | a | d | c |
| 4. | a | b | d | c |
All the following characteristics differentiate stems from the roots except:
1. Development from the plumule
2. Presence of nodes and internodes
3. Terminal or axillary buds
4. Endogenous development of branches
Stems contain chlorophyll and carry out photosynthesis in:
| 1. Opuntia and Euphorbia | 2. Mint and Jasmine |
| 3. Pistia and Eichhornia | 4. Banana and Pineapple |
A lateral branch arises from the base of the main axis and after growing aerially for some time arches downwards to touch the ground in:
| 1. Opuntia and Euphorbia | 2. Mint and Jasmine |
| 3. Pistia and Eichhornia | 4. Banana and Pineapple |
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