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Q. No.Regarding double fertilization in angiosperms:
I:
syngamy requires one male gamete and one egg cell
II:
triple fusion requires one male gamete, one egg cell and one polar nucleus
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Double Fertilization |
84%
Level 1: 80%+
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A typical angiosperm anther in transverse section will show:
| 1. | two lobes, each lobe having two theca and each theca having two microsporangia |
| 2. | two lobes, each lobe having two theca and each theca having four microsporangia |
| 3. | two lobes, each lobe having two theca and each lobe having two microsporangia |
| 4. | two lobes, each lobe having two theca and each lobe having four microsporangia |
Subtopic: Stamen: Anther |
53%
Level 3: 35%-60%
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What is the function of the ears in the corn cob?
| 1. | To protect seeds | 2. | To attract insects |
| 3. | To trap pollen grains | 4. | To disperse pollen grains |
Subtopic: Pollination & Outbreeding Devices |
79%
Level 2: 60%+
NEET - 2023
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NEET 2026 - Target Batch - Vital
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In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are :
| 1. | Synergids, antipodals and Polar nuclei |
| 2. | Synergids, Primary endosperm nucleus and zygote |
| 3. | Antipodals, synergids, and primary endosperm nucleus |
| 4. | Synergids, Zygote and Primary endosperm nucleus |
Subtopic: Double Fertilization |
82%
Level 1: 80%+
NEET - 2023
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NEET 2026 - Target Batch - Vital
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Large, colorful, fragrant flowers with nectar are seen in:
| 1. | wind pollinated plants | 2. | insect pollinated plants |
| 3. | bird pollinated plants | 4. | bat pollinated plants |
Subtopic: Pollination & Outbreeding Devices |
89%
Level 1: 80%+
NEET - 2023
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NEET 2026 - Target Batch - Vital
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In which of the following sets of families, the pollen grain are viable for months?
1. Solanaceae, Poaceae and Liliaceae
2. Brassicaceae, Liliaceae and Poaceae
3. Rosaceae, Liliaceae and Poaceae
4. Leguminosae, Solanaceae and Rosaceae
1. Solanaceae, Poaceae and Liliaceae
2. Brassicaceae, Liliaceae and Poaceae
3. Rosaceae, Liliaceae and Poaceae
4. Leguminosae, Solanaceae and Rosaceae
Subtopic: Stamen: Microsporangium | Stamen: Male Gametophyte |
84%
Level 1: 80%+
NEET - 2023
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Transfer of pollen grains from anther to stigma of another flower of same plant is known as:
| 1. | Geitonogamy | 2. | Xenogamy |
| 3. | Autogamy | 4. | Cleistogamy |
Subtopic: Pollination & Outbreeding Devices |
88%
Level 1: 80%+
NEET - 2023
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NEET 2026 - Target Batch - Vital
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In angiosperms, the correct sequence of events leading to the formation of female gametophyte in the ovule is:
Choose the correct answer from the options given below:
| A. | 3 successive free nuclear divisions in functional megaspore. |
| B. | Degeneration of 3 megaspores |
| C. | Meiotic division in megaspore mother cell |
| D. | Migration of 3 nuclei towards each pole. |
| E. | Formation of a wall resulting in seven celled embryosac. |
Choose the correct answer from the options given below:
| 1. | (A), (B), (C), (D), (E) | 2. | (C), (E), (A), (D), (B) |
| 3. | (B), (C), (A), (D), (E) | 4. | (C), (B), (A), (D), (E) |
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
77%
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Given below are two statements:
| Assertion (A): | Cleistogamous flowers are invariably autogamous. |
| Reason (R): | Cleistogamous flowers never expose their sex organs, so there is no chance of cross pollination in these flowers. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Pollination & Outbreeding Devices |
91%
Level 1: 80%+
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Read the following statements and select the correct option w.r.t angiosperms for blanks A, B and C.
I. The body of ovule with funicle in the region called A .
II. Female gametophyte is also called B .
III. C plays an important role in guiding the pollen tube into synergids.
I. The body of ovule with funicle in the region called A .
II. Female gametophyte is also called B .
III. C plays an important role in guiding the pollen tube into synergids.
| A | B | C | |
| 1. | Hilum | Embryo | Antipodal cell |
| 2. | Nucellus | Ovary | Polar nuclei |
| 3. | Micropyle | Ovary | Filiform apparatus |
| 4. | Hilum | Embryo sac | Filiform apparatus |
Subtopic: Pistil: Ovule | Seed |
88%
Level 1: 80%+
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