Q. No.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
A dioecious flowering plant prevents both:
| 1. | Autogamy and xenogamy |
| 2. | Autogamy and geitonogamy |
| 3. | Geitonogamy and xenogamy |
| 4. | Cleistogamy and xenogamy |
Attractants and rewards are required for:
1. Anemophily
2. Entomophily
3. Hydrophily
4. Cleistogamy
Cultivation of flowering and ornamental plants for gardens and for commerce and trade is called:
| 1. | Horticulture | 2. | Plant breeding |
| 3. | Floriculture | 4. | Micropropagation |
Tapetum :
| I. | Is a layer of nutritive cells that are found within the microsporangium. |
| II. | The cells are usually bigger and normally have more than one nucleus per cell because mitosis is not normal in them. |
| III. | Helps in pollen wall formation, transportation of nutrients to the inner side of the anther, synthesis of callose enzyme for separation of microspore tetrads. |
Of the above statements, the correct ones are:
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
Pollen grains lose viability within 30 minutes of their release in some members of:
| 1. | Rosaceae | 2. | Leguminosae |
| 3. | Poaceae | 4. | Solanaceae |
Consider the following two statements regarding the integuments of an ovule:
| I: | Angiosperms are generally bitegmic and gymnosperms unitegmic. |
| II: | The integuments develop into the seed coat when the ovule matures after fertilization. |
Of the two statements:
1. Both I and II are true
2. Both I and II are false
3. Only I is true
4. Only II is true
How many cells of the female gametophyte are surrounded by a cell wall and are organized into cells?
| 1. | 6 | 2. | 7 |
| 3. | 8 | 4. | 2 |
Cleistogamous flowers are:
| 1. | Mostly autogamous | 2. | Invariably autogamous |
| 3. | Mostly xenogamous | 4. | Invariably xenogamous |
Which of the following is not a character of anemophilous flowers?
1. Pollens are light and non sticky
2. Stamens are well exposed
3. Have large, often feathery stigma
4. Have multiple ovules in each ovary
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