The mature seeds of plants such as gram and peas, posses no endosperm, because
1. These plants are not angiosperms
2. There is no double fertilization in them
3. Endosperm is not formed in them
4. Endosperm gets used up by the developing embryo during seed development
Match the following and choose correct option
Group A Group B
A. Aleurone layer i. without fertilization
B. Parthenocarpic fruit ii. Nutrition fruit
C. Ovule iii. Double fertilization
D. Endosperm iv. Seed
1. A-i, B-ii, C-iii, D-iv
2. A-ii, B-i, C-iv, D-iii
3. A-iv, B-ii, C-i, D-iii
4. A-ii, B-iv, C-i, D-iii
Following are four statements find out correct statements
(i) Microsporangia has four layers, outer three are protective and inner one is nutritive
(ii) Each cell of sporogenous tissue within micorsporangia is capable of giving raise to a microspore tetrad.
(iii) Dehydration of anther is important for seperation of pollen grains in a tetrad.
(iv) Generative cell in pollen grain is small with respect to vegetative cell and it floats in cytoplasm of vegetative cell.
Options
1. All are correct
2. Only (i), (ii) and (iii) is correct
3. Except (ii) all are correct
4. Expect (iii) all are correct.
In a cereal grain, the single cotyledon of the embryo is represented by:
1. | coleorhiza | 2. | scutellum |
3. | prophyll | 4. | coleoptiles |
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 |
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 |
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 |
The pollen grain represents
1. Male gamete
2. Male gametophyte
3. Microsporophyll
4. Microsporangium
Choose the correct option with respect to the function of the germ pore.
1. It allows growth of pollen tube
2. It allows water absorption in seed
3. It helps dehiscence of pollen grain
4. More than one option is correct
The number of mitotic generations required to form a mature embryo sac from megaspore in most of the flowering plants is
1. One
2. Two
3. Three
4. Four