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Q. No.In pollen banks, pollen grains are stored in
1. Dry ice
2. Normal room temperature
3. Liquid nitrogen
4. Absolute alcohol
Subtopic: Stamen: Male Gametophyte |
97%
From NCERT
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Identify the figure and select the correct option for the labellings A, B, C and D.
| A | B | C | D | |
| 1. | Coleorhiza | Shoot apex | Epiblast | Radicle |
| 2. | Scutellum | Coleoptile | Shoot apex | Coleorhiza |
| 3. | Coleoptile | Cotyledon | Epiblast | Radicle |
| 4. | Scutellum | Coleoptile | Epiblast | Coleorhiza |
Subtopic: Embryo |
72%
From NCERT
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In papaver
(a) Each pistil has many ovaries
(b) Gynoecium has many carples.
(c) Pistils are fused together
(d) Each pistil has its own stigma.
1. (a), (c) and (d)carpels
2. (c) only
3. (b) and (c) only
4. (b), (c) and (d)
(a) Each pistil has many ovaries
(b) Gynoecium has many carples.
(c) Pistils are fused together
(d) Each pistil has its own stigma.
1. (a), (c) and (d)carpels
2. (c) only
3. (b) and (c) only
4. (b), (c) and (d)
Subtopic: Pistil: Female Gametophyte |
From NCERT
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Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
60%
From NCERT
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The mass of cells in megasporangium of a flower that have abundant materials is
1. Integument
2. Haploid tissue of female parent
3. Diploid tissue of parent
4. Hilum
1. Integument
2. Haploid tissue of female parent
3. Diploid tissue of parent
4. Hilum
Subtopic: Pistil: Female Gametophyte |
59%
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Read the following statements and state them true (T) or False (F)
| A. | Continued cross pollination of plants results in inbreeding depression. |
| B. | In members of Poaceae, the single cotyledon is called scutellum. |
| C. | Apple is a false fruit because it is developed only from the ovary. |
| A | B | C | |
| 1. | T | T | F |
| 2. | T | F | T |
| 3. | F | F | T |
| 4. | F | T | F |
Subtopic: Pollination & Outbreeding Devices |
72%
From NCERT
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In majority of flowering plants, embryo sac formation is monosporic. it means
| 1. | A single megaspore mother cell is involved in the formation of embryo sac |
| 2. | A single megaspore is involved in the formation of embryo sac |
| 3. | Each embryo sac has only one female gamete |
| 4. | Each megaspore mother cell is modified to form a single megaspore |
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
63%
From NCERT
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Central cell of a typical embryo sac
1. Is not surrounded by cell wall
2. Is situated above the egg apparatus
3. Has two polar nuclei
4. Forms the cotyledon of the embryo
1. Is not surrounded by cell wall
2. Is situated above the egg apparatus
3. Has two polar nuclei
4. Forms the cotyledon of the embryo
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
83%
From NCERT
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Pollination is the process
| 1. | That always requires external agents |
| 2. | By which pollen grain is transferred to the receptacle of the flower |
| 3. | In which male gametophyte is transferred to the landing platform of the pistil |
| 4. | That facilitated the dispersal of pollen grains |
Subtopic: Pollination & Outbreeding Devices |
74%
From NCERT
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In plants such as Oxalis, the possible type of pollination can be
1. Only autogamy and geitonogamy
2. Only xenogamy
3. Only autogamy
4. All autogamy, geitonogamy and xenogamy
1. Only autogamy and geitonogamy
2. Only xenogamy
3. Only autogamy
4. All autogamy, geitonogamy and xenogamy
Subtopic: Pollination & Outbreeding Devices |
From NCERT
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