Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?
1.
Ovules develop into an embryo sac
2.
Ovary develops into fruit
3.
Zygote develops into an embryo
4.
Central cell develops into endosperm
What is the fate of the male gametes discharged in the synergid?
| 1. | One fuses with the egg and the other fuses with central cell nuclei |
| 2. | One fuses with the egg and the other(s) degenerate(s) in the synergid |
| 3. | All fuse with the egg |
| 4. | One fuses with the egg and the other(s) fuse(s) with a synergid nucleus |
In some plants, the female gamete develops into an embryo without fertilization. This phenomenon is known as:
| 1. | Parthenogenesis | 2. | Autogamy |
| 3. | Parthenocarpy | 4. | Syngamy |
1. Gramineae
2. Solanaceae
3. Orchidaceae
4. Malvaceae
| I. | Tapetum nourishes the developing pollen grains. |
| II. | Hilum represents the junction between the ovule and the funicle. |
| III. | In aquatic plants such as water hyacinths and water lily, pollination is by water. |
| IV. | The primary endosperm nucleus is triploid. |
1. I, II, and IV are correct, but Ill is incorrect
2. I and II are correct, but Ill and IV are incorrect
3. I and IV are correct, but II and Ill are incorrect
4. I, Ill and IV are correct, but I is incorrect
In some organisms, karyokinesis is not followed by cytokinesis as a result of which, the multinucleate condition arises leading to the formation of the syncytium. The perfect example for this is:
1. Appearance of a furrow in cell membrane
2. Liquid endosperm in coconut
3. Sexual reproduction
4. Fertilization
In the given diagram, parts labeled as A, B, C, D, E and F are respectively identified as:
1. synergids, polar nuclei, central cell, antipodals, filiform apparatus and egg
2. polar nuclei, egg, antipodals, central cell, filiform apparatus and synergids
3. egg, synergids, central cell, filiform apparatus, antipodals and polar nuclei
4. central cell, polar nuclei, filiform apparatus, antipodals, synergids and egg
The following is the diagram of TS of Anther. Identify the parts labelled as A, B and C.
1. A-Epidermis, B-Endothecium, C-Spongenous
2. A-Endothecium, B-Connective, C-Pollengrain
3. A-Pollen grain, B-Connective, C- Endothecium
4. None of the above
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