Q. No.Which of the following is incorrect regarding seeds in angiosperms?
| 1. | Mature seeds of peas and ground nuts are ex-albuminous. |
| 2. | Perisperm is seen in the mature seeds of black pepper and beet. |
| 3. | Dormant seeds have relatively higher moisture content than germinating seeds. |
| 4. | As ovules mature into seeds, the ovary develops into a fruit. |
Filiform apparatus is associated with _____ and helps in _____________.
1. Syngergids; Nourishment of egg cells
2. Synergids; Guiding the pollen tube
3. Antipodals; Nourishment of egg cells
4. Antipodals; Guiding the pollen tube
The pollen tube releases the two male gametes first into:
1. The vicinity of the egg cell.
2. The vicinity of polar nuclei.
3. In the cytoplasm of synergids.
4. In the cytoplasm of antipodals.
Cleistogamous flowers are:
| 1. | Mostly autogamous | 2. | Invariably autogamous |
| 3. | Mostly xenogamous | 4. | Invariably xenogamous |
Match each item in Column I with one item in Column II and chose your answer from the codes given below.
|
Column I (pollination) |
Column II (example) |
||
| I. | Anemophily | 1. | Zostera |
| II. | Hydrophily | 2. | Maize |
| III. | Ornithophily | 3. | Kigelia |
| IV. | Chirepterophily | 4. | Butea monosperma |
Codes:
| Options: | I | II | III | IV |
| 1. | 1 | 2 | 3 | 4 |
| 2. | 2 | 1 | 4 | 3 |
| 3. | 2 | 1 | 3 | 4 |
| 4. | 1 | 2 | 4 | 3 |
Perisperm differs from endosperm in:
| 1. | having no reserved food. |
| 2. | being a diploid tissue. |
| 3. | its formation by fusion of a secondary nucleus with several sperms. |
| 4. | being a haploid tissue. |
When a plant grows from an embryo, the embryonic organ that persists for the entire life of the plant is:
| 1. | cotyledon | 2. | hypocotyl |
| 3. | suspensor | 4. | seed coat |
In a type of apomixis known as adventive embryony, embryos develop directly from:
1. Nucellus or integument
2. Zygote
3. Synergids of antipodals of embryo sac
4. Accessory embryo sac in the ovule
How many cells of the female gametophyte are surrounded by a cell wall and are organized into cells?
| 1. | 6 | 2. | 7 |
| 3. | 8 | 4. | 2 |
Identify the incorrectly matched pair:
| Cell | Ploidy | |
| 1. | Cells of nucellus | Diploid |
| 2. | Megaspore mother cell | Haploid |
| 3. | Functional megaspore | Haploid |
| 4. | Cells of female gametophyte | haploid |
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