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Q. No.Endosperm is completely consumed by the developing embryo before seed maturation in all the following except:
1. pea
2. groundnut
3. beans
4. castor
Subtopic: Embryo | Seed |
88%
Level 1: 80%+
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Embryos of monocotyledons possess only one cotyledon. How many of the following statements will be true?
1. 1
2. 2
3. 3
4. 4
| I: | In the grass family, the cotyledon is called scutellum that is situated towards one side (lateral) of the embryonal axis. |
| II: | At its lower end, the embryonal axis has the radical and root cap enclosed in an undifferentiated sheath called coleorrhiza. |
| III: | The portion of the embryonal axis above the level of attachment of scutellum is the epicotyl. |
| IV: | Epicotyl has a shoot apex and a few leaf primordia enclosed in a hollow foliar structure, the coleoptile. |
1. 1
2. 2
3. 3
4. 4
Subtopic: Endosperm | Embryo |
78%
Level 2: 60%+
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In black pepper and beet:
1. seed are formed without fertilisation
2. remnants of nucellus are persistent
3. seeds are ex-albuminous
4. parthenocarpy is common in natural conditions
1. seed are formed without fertilisation
2. remnants of nucellus are persistent
3. seeds are ex-albuminous
4. parthenocarpy is common in natural conditions
Subtopic: Embryo | Seed | Fruit |
92%
Level 1: 80%+
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Consider the given two statements:
| Assertion (A): | In a few species such as apple, strawberry, cashew, etc., fruits produced are called false fruits. |
| Reason (R): | In these plants, by the time the fruit develops from the ovary, other floral parts degenerate and fall off. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Fruit |
76%
Level 2: 60%+
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Discovered during the archeological excavation at King Herod’s palace near the Dead Sea, a 2000 years old viable seed is of:
| 1. | Phoenix dactylifera | 2. | Arabidopsis thaliana |
| 3. | Lupinus arcticus | 4. | Melandrium album |
Subtopic: Monocarpic & Polycarpic | FLOWER – A FASCINATING ORGAN OF ANGIOSPERMS |
82%
Level 1: 80%+
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The given figure shows:
1. Multicarpellary, syncarpous pistil
2. Multicarpellary, apocarpous gynoecium
3. Monocarpellary gynoecium
4. Sterile pistil
1. Multicarpellary, syncarpous pistil2. Multicarpellary, apocarpous gynoecium
3. Monocarpellary gynoecium
4. Sterile pistil
Subtopic: Monocarpic & Polycarpic | Pistil: Ovule | Pistil: Female Gametophyte |
77%
Level 2: 60%+
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Consider the given two statements:
| Assertion (A): | Endosperm tissue of angiosperms can be a source of nutrition in animal diet. |
| Reason (R): | Wheat endosperm is ground into flour for bread, while barley endosperm is the main source of sugars for beer production. |
| 1. | Both (A) and (R) are True and (R) explains (A) |
| 2. | Both (A) and (R) are True and (R) does not explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Endosperm |
Level 3: 35%-60%
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Consider the given two statements:
| Assertion (A): | Seed is the basis of our agriculture. |
| Reason (R): | Seeds are normally the products of sexual reproduction in angiosperms. |
| 1. | Both (A) and (R) are True and (R) explains (A) |
| 2. | Both (A) and (R) are True and (R) does not explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Seed |
68%
Level 2: 60%+
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Nucellar embryony:
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: | is a type of apomixes |
| II: | occurs in many citrus varieties |
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: Apomixis & Polyembryony |
78%
Level 2: 60%+
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| Assertion (A): | In angiosperms, the male gametophyte contains a single male gamete that unites with the egg to produce the seed. |
| Reason (R): | The embryosac in angiosperms has an egg apparatus that consists of only one egg cell. |
| 1. | Both (A) and (R) are True but the (R) does not correctly explain the (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True and the (R) correctly explains the (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Stamen: Male Gametophyte |
71%
Level 2: 60%+
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