Q. No.From among the sets of terms given below, identify those that are associated with the gynoecium.
1.
Stigma, ovule, embryo sac, placenta
2.
Thalamus, pistil, style, ovule
3.
Ovule, ovary, embryo sac, tapetum
4.
Ovule, stamen, ovary, embryo sac
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Starting from the innermost part, the correct sequence of parts in an ovule are:
| 1. | egg, nucellus, embryo sac, integument |
| 2. | egg, embryo sac, nucellus, integument |
| 3. | embryo sac, nucellus, integument, egg |
| 4. | egg, integument, embryo sac, nucellus |
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From the statements given below, choose the option that is true for a typical female gametophyte of a flowering plant:
| i. | It is 8-nucleate and 7-celled at maturity |
| ii. | It is free-nuclear during the development |
| iii. | It is situated inside the integument but outside the nucellus |
| iv. | It has an egg apparatus situated at the chalazal end |
| 1. | i and iv | 2. | ii and iii |
| 3. | i and ii | 4. | ii and iv |
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Choose the correct statement from the following:
| 1. | Cleistogamous flowers always exhibit autogamy |
| 2. | Chasmogamous flowers always exhibit geitonogamy |
| 3. | Cleistogamous flowers exhibit both autogamy and geitonogamy |
| 4. | Chasmogamous flowers never exhibit autogamy |
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From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
| 1. | Monoecious plant bearing unisexual flowers |
| 2. | Dioecious plant bearing only male or female flowers |
| 3. | Monoecious plant with bisexual flowers |
| 4. | Dioecious plant with bisexual flowers |
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In a fertilised embryo sac, the haploid, diploid, and triploid structures are:
| 1. | Synergid, zygote, and primary endosperm nucleus |
| 2. | Synergid, antipodal and polar nuclei |
| 3. | Antipodal, synergid, and primary endosperm nucleus |
| 4. | Synergid, polar nuclei and zygote. |
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While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant?
1. Bagging of the female flower
2. Dusting of pollen on the stigma
3. Emasculation
4. Collection of pollen
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The phenomenon wherein, the ovary develops into a fruit without fertilisation is called:
| 1. | Parthenocarpy | 2. | Apomixis |
| 3. | Asexual reproduction | 4. | Sexual reproduction |
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Pollen grains lose viability within 30 minutes of their release in some members of:
| 1. | Rosaceae | 2. | Leguminosae |
| 3. | Poaceae | 4. | Solanaceae |
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Consider the following two statements regarding the integuments of an ovule:
| I: | Angiosperms are generally bitegmic and gymnosperms unitegmic |
| II: | The integuments develop into the seed coat when the ovule matures after fertilization. |
Of the two statements:
1. Both I and II are true
2. Both I and II are false
3. Only I is true
4. Only II is true
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