Q. No.All the following can be considered as equivalent terms except:
1.
Megasporangium
Ovule
2.
Megasporophyll
Stamen
3.
Female gametophyte
Embryo sac
4.
Microspore
Pollen grain
1.
Megasporangium
Ovule
2.
Megasporophyll
Stamen
3.
Female gametophyte
Embryo sac
4.
Microspore
Pollen grain
Match each item in Column I with one in Column II and select the correct answer from the codes given:
|
A. |
Pollen exine |
P. |
Cellulose and pectin |
|
B. |
Pollen intine |
Q. |
Sporopollenin |
|
C. |
Antipodals |
R. |
Nutrition to the embryo sac |
|
D. |
Synergids |
S. |
Pollen tube guidance |
|
A. |
B. |
C. |
D. |
|
|
1. |
P |
Q |
R |
S |
|
2. |
Q |
P |
S |
R |
|
3. |
Q |
P |
R |
S |
|
4. |
P |
Q |
S |
R |
Scientists around the world are trying to transfer apomictic genes into hybrid varieties primarily because:
| 1. | cultivation of hybrids has tremendously increased productivity in many important crops. |
| 2. | hybrids are seedless varieties and therefore propagation becomes very difficult. |
| 3. | if seeds from the hybrids are sown, segregation leads to the loss of hybrid characters. |
| 4. | apomixis eliminates the use of seeds in the propagation of plants. |
The following diagram shows:
| 1. | Multicarpellary, syncarpus pistil of Papaver |
| 2. | Multicarpellary, apocarpus pistil of Papaver |
| 3. | Multicarpellary, apocarpous gynoecium of Michelia |
| 4. | Multicarpellary, syncarpous gynoecium of Michelia |
Consider the following statements:
| I: | A monoecious plant bears either male or female flowers. |
| II: | In monoecious plants, autogamy may be prevented but not geitonogamy. |
| III: | Cucurbits and coconuts are monoecious plants. |
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
Pollen tube, after reaching the ovary, enters the ovule through _______ and then enters one of the _____________ through filiform apparatus.
| 1. | Chalaza; Synergids | 2. | Micropyle; Antipodals |
| 3. | Micropyle; Synergids | 4. | Chalaza; Antipodals |
Division of functional megaspore can be described as:
| 1. | Three free nuclear mitotic divisions. |
| 2. | One meiotic and two mitotic divisions, all free nuclear. |
| 3. | Three cytoplasmic mitotic divisions. |
| 4. | One meiotic and two mitotic divisions, meiotic being cytoplasmic and mitotic being free nuclear. |
The body of the ovule fuses with the funicle in the region called:
| 1. | Chalaza |
| 2. | Micropyle |
| 3. | Hilum |
| 4. | Nucellus |
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