Q. No.Cleistogamous flowers are:
| 1. | Mostly autogamous | 2. | Invariably autogamous |
| 3. | Mostly xenogamous | 4. | Invariably xenogamous |
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Match each item in Column I with one item in Column II and chose your answer from the codes given below.
|
Column I (pollination) |
Column II (example) |
||
| I. | Anemophily | 1. | Zostera |
| II. | Hydrophily | 2. | Maize |
| III. | Ornithophily | 3. | Kigelia |
| IV. | Chirepterophily | 4. | Butea monosperma |
Codes:
| Options: | I | II | III | IV |
| 1. | 1 | 2 | 3 | 4 |
| 2. | 2 | 1 | 4 | 3 |
| 3. | 2 | 1 | 3 | 4 |
| 4. | 1 | 2 | 4 | 3 |
Flowers that have a single ovule in the ovary and are packed into inflorescence are usually pollinated by:
| 1. | Water | 2. | Bee |
| 3. | Wind | 4. | Bat |
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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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Geitonogamy involves:
| 1. | Pollination of a flower by the pollen from another flower of the same plant. |
| 2. | Pollination of a flower by the pollen from another same flower. |
| 3. | Pollination of a flower by the pollen from a flower of another plant in the same population. |
| 4. | Pollination of a flower by the pollen from a flower of another plant belonging to a distant population. |
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Which of the following is not used by flowering plants as an outbreeding device?
| 1. | Lack of synchronization between pollen release and stigma receptivity. |
| 2. | Anther and Stigma placed at different levels. |
| 3. | Self-incompatibility. |
| 4. | Production of bisexual flowers. |
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Dioecy in flowering plants prevents:
| 1. | Autogamy but not Geitonogamy |
| 2. | Geitonogamy but not Autogamy |
| 3. | Both Geitonogamy and Autogamy |
| 4. | Neither Geitonogamy nor Autogamy |
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A particular species of the plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These
modifications facilitate pollination by:
| 1. | Insects | 2. | Water |
| 3. | Wind | 4. | Animals |
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Long filamentous threads protruding at the end of a young cob of maize are:
| 1. | anthers | 2. | styles |
| 3. | ovaries | 4. | hairs |
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In angiosperms:
1. Pollen grains are motile but the egg cell is non-motile.
2. Pollen grains are non-motile but the egg cell is motile.
3. Both pollen grain and egg cell are non-motile.
4. Both pollen grain and egg cell are motile.
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