- 1(current)
Q. No.Identify the incorrectly matched pair:
|
1. |
Triploid nutritive tissue of a seed deposited externally to the embryo sac |
Perisperm |
|
2. |
The tissue that arises from the ripened ovary wall of a fruit; the fruit wall |
Pericarp |
|
3. |
The natural or artificially induced production of fruit without fertilisation of ovules |
Parthenocarpy |
|
4. |
Asexual reproduction where the growth and development of embryos occur without fertilization by sperm |
Parthenogenesis |
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Three air-dried bean seeds are tied to a glass slide with two [A and C in the fig.] at the two ends and one [B] in the middle. This slide is placed in a beaker with the middle seed half immersed in water as shown in the fig. The water level is kept constant throughout the experiment. Which seed/s is/are expected to germinate normally?
| 1. | Only A | 2. | Only B |
| 3. | Only B and C | 4. | Only A and C |
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Seed formation is a more dependable reproductive strategy in angiosperms because:
| 1. | Pollination and fertilization are independent of water |
| 2. | Seeds have better adaptive strategies for dispersal |
| 3. | Seeds have sufficient food reserves |
| 4. | New genetic combinations are generated during seed formation |
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Seeds offer several advantages to angiosperms. Which of the following is not one?
| 1. | The process is more dependable |
| 2. | Better adaptive strategies for dispersal |
| 3. | Protection of the young embryo |
| 4. | Genetic uniformity |
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| Statement I: | A is pericarp. |
| Statement II: | B is the cotyledon of the monocot seed. |
| Statement III: | C is triploid in nature and develops before B. |
| 1. | Only Statement I is correct |
| 2. | Only Statement II and Statement III are correct |
| 3. | Only Statement II is correct |
| 4. | Only Statement III is correct |
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| Assertion (A): | Seed is the basis of our agriculture. |
| Reason (R): | Dehydration and dormancy of mature seeds enable them to be stored and used as food throughout the year and also to raise the crop in the next season. |
| 1. | (A) is false but (R) is true. |
| 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 true and (R) is the correct explanation of (A). |
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The Plant is:
1. Lupinus arcticus
2. Phoenix dactylifera
3. Cycas revoluta
4. Gnetum
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- 1(current)
Q. No.
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