Q. No.What is common between the two species shown in the figures?
1. Both are angiosperms.
2. Both are gymnosperm.
3. Both are chasmogamous flowers.
4. Both (1) and (3)
1. egg cell
2. embryo
3. embryo sac
4. all of the above will be formed
(i) Pollen release and stigma receptivity are not synchronised.
(ii) Different positions of anther and stigma.
(iii) Production of different types of pollen grains.
(iv) Formation of unisexual flowers along with bisexual flowers.
(v) Preventing self-pollen from fertilising the ovules by inhibiting pollen germination.
1. (i), (ii) and (v)
2. (ii), (iii) and (v)
3. (i), (iii) and (v)
4. (iii), (iv) and (v)
1. are large in size and always white in colour
2. secrete foul odours to attract these animals
3. produce winged pollens
4. are invariably pollinated by abiotic agents as well
Which of the following statements is correct with respect to parthenocarpic fruit?
(1) They develop from the thalamus
(2) They can be formed by the application of growth hormones
(3) These fruits bear seeds
(4) Can be exemplified by strawberry and cashew
In some members of which of the following pairs of families, pollen grains retain their viability for months after release?
1. Poaceae; Solanaceae
2. Rosaceae; Leguminosae
3. Poaceae; Rosaceae
4. Poaceae; Leguminosae
A typical angiosperm embryo sac at maturity is:
1. 7-nucleate and 7-celled
2. 8-nucleate and 8-celled
3. 8-nucleate and 7-celled
4. 7-nucleate and 8-celled
The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which during pollination, brings genetically different types of pollen grains to stigma, is:
| 1. | Chasmogamy | 2. | Cleistogamy |
| 3. | Xenogamy | 4. | Geitonogamy |
Which of the following is incorrect for wind-pollinated plants?
1. Well exposed stamens and stigma
2. Many ovules in each ovary
3. Flowers are small and not brightly colored
4. Pollen grains are light and non-sticky
In some plants, the thalamus contributes to fruit formation. Such fruits are termed as:
1. False fruits
2. Aggregate fruits
3. True fruits
4. Parthenocarpic fruits
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