Q. No.Which of the following is incorrect regarding seeds in angiosperms?
1.
Mature seeds of peas and ground nuts are ex-albuminous.
2.
Perisperm is seen in the mature seeds of black pepper and beet.
3.
Dormant seeds have relatively higher moisture content than germinating seeds.
4.
As ovules mature into seeds, the ovary develops into a fruit.
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To encourage cross-pollination, all the following devices will be useful in an angiosperm except:
| 1. | Self-incompatibility |
| 2. | Asynchrony between pollen release and stigma receptivity |
| 3. | Cleistogamous flowers |
| 4. | Dioecy |
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Identify the incorrectly matched pair:
|
1. |
Cleistogamous flowers |
Invariable autogamous |
|
2. |
Geitonogamy |
Functionally cross-pollination |
|
3. |
Wind pollination |
Common in grasses |
|
4. |
Pollination by water |
Seen in all aquatic plants |
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Which of the following is incorrect regarding pollen grains in angiosperms?
| 1. | The exine is made up of sporopollenin. |
| 2. | Generative cell divides meiotically to give rise to four gametes. |
| 3. | In over 60% of angiosperms, pollen grains are shed at the 2-celled stage. |
| 4. | Pollen grains of many species can cause severe allergies in humans. |
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Identify the incorrect statement regarding angiosperm:
| 1. | A typical anther is bilobed and dithecous |
| 2. | Cells of tapetum are nourishing to developing pollen grains |
| 3. | In over 60% of angiosperms pollen grains are shed at the 3-celled stage |
| 4. | It is possible to store many pollen grains by cryopreservation |
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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 |
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The following diagram shows:
 |
|
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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 |
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