Q. No.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
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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 |
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The term that describes united sepals in a flower is:
| 1. | Calyx | 2. | Perianth |
| 3. | Gamosepalous | 4. | Polysepalous |
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A parallel venation will be seen in the leaves of all the following plants except:
| 1. | Wheat | 2. | Rice |
| 3. | Pea | 4. | Maize |
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Root hairs at the root tip are formed by:
| 1. | Epidermal cells in the region of maturation |
| 2. | Cortical cells in the region of elongation |
| 3. | Epidermal cells in the region of elongation |
| 4. | Cortical cells in the region of maturation |
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Seed coat is membranous and generally fused with the fruit wall in:
| 1. | Apple | 2. | Maize |
| 3. | Coconut | 4. | Castor |
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In mango, the fruit is:
| 1. | drupe and mesocarp is fleshy and edible |
| 2. | drupe and mesocarp is fibrous |
| 3. | berry and mesocarp is fleshy and edible |
| 4. | berry and mesocarp is fibrous |
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When sepals or petals in a whorl just touch one another at the margin, without overlapping, the aestivation is said to be:
| 1. | Valvate | 2. | Twisted |
| 3. | Imbricate | 4. | Vexillary |
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