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Q. No.Albuminous seeds store their reserve food mainly in:
1. Endosperm
2. Cotyledons
3. Hypocotyl
4. Perisperm
Subtopic: Seed |
77%
Level 2: 60%+
NEET - 2013
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Which of the following statements is correct?
| 1. | Sporopollenin can be degraded by enzymes |
| 2. | Sporopollenin in made up of inorganic materials |
| 3. | Sporopollenin can withstand high temperatures as well as strong acids and alkalis |
| 4. | Sporopollenin can withstand high temperatures but not strong acids |
Subtopic: Stamen: Male Gametophyte |
91%
Level 1: 80%+
NEET - 2013
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Adventive embryony is a type of apomixis where the embryos are derived directly from:
1. Nucellus or integument
2. Zygote
3. Synergids of antipodals of embryo sac
4. Accessory embryo sac in the ovule
1. Nucellus or integument
2. Zygote
3. Synergids of antipodals of embryo sac
4. Accessory embryo sac in the ovule
Subtopic: Embryo |
70%
Level 2: 60%+
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| Assertion (A): | Geitonogamy is similar to autogamy. |
| Reason (R): | Pollen grains come from the same flower of a different plant. |
| 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. | (A) is False but (R) is True. |
Subtopic: Pollination & Outbreeding Devices |
78%
Level 2: 60%+
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Assertion(A): Angiosperms have a unique phenomenon called double fertilization.
Reason(R): Double fertilization includes triple fusion and syngamy in the embryo sac.
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. (A) is false, but (R) is true.
Reason(R): Double fertilization includes triple fusion and syngamy in the embryo sac.
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. (A) is false, but (R) is true.
Subtopic: Double Fertilization |
Level 3: 35%-60%
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Assertion(A): Seed formation is more dependable (assured) in angiosperms.
Reason(R): Reproductive processes such as pollination and fertilization are dependent on water in angiosperms.
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. (A) is false, but (R) is true.
Reason(R): Reproductive processes such as pollination and fertilization are dependent on water in angiosperms.
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. (A) is false, but (R) is true.
Subtopic: Seed |
75%
Level 2: 60%+
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Zea mays have 20 chromosomes in its somatic cell. The number of chromosomes in its endosperm will be:
| 1. | 10 | 2. | 20 |
| 3. | 30 | 4. | 40 |
Subtopic: Double Fertilization | Endosperm |
77%
Level 2: 60%+
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The two innermost wall layers of microsporangium in an anther are:
| 1. | Endothecium and tapetum |
| 2. | Epidermis and endodermis |
| 3. | Epidermis and middle layer |
| 4. | Middle layer and tapetum |
Subtopic: Stamen: Microsporangium |
84%
Level 1: 80%+
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At maturity, the female gametophyte in angiosperms has:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | Three cells grouped together at the micropylar end constituting the egg apparatus |
| II: | Three cells are at the chalazal end and are called the antipodals |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Pistil: Female Gametophyte |
89%
Level 1: 80%+
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Consider the two statements:
| Statement I: | Cleistogamous flowers are invariably autogamous. |
| Statement II: | Chasmogamous flowers can never be autogamous. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Pollination & Outbreeding Devices |
81%
Level 1: 80%+
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