Q. No.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 |
Match Column I with Column II and select the correct option using the codes given below:
|
Column I |
|
Column II |
|
|
A. |
Pistils fused together |
1. |
Gametogenesis |
|
B. |
Formation of gametes |
2. |
Pistillate |
|
C. |
Hyphae of higher ascomycetes |
3. |
Syncarpous |
|
D. |
Unisexual female flower |
4. |
Dikaryotic |
Codes:
|
A |
B |
C |
D |
|
|
1. |
4 |
3 |
2 |
1 |
|
2. |
2 |
1 |
4 |
3 |
|
3. |
1 |
2 |
4 |
3 |
|
4. |
3 |
1 |
4 |
2 |
स्तंभ II के साथ स्तंभ I का मिलान करें और नीचे दिए गए संकेतों का उपयोग करके सही विकल्प चुनें:
|
स्तंभ I |
|
स्तंभ II |
|
|
A. |
स्त्रीकेसर एक साथ संगलित |
1. |
युग्मकजनन |
|
B. |
युग्मकों का गठन |
2. |
स्त्रीकेसरी |
|
C. |
उच्च एस्कोमाइसिटीज के कवक तंतु |
3. |
युक्तांडपी |
|
D. |
उभयलिंगी मादा पुष्प |
4. |
द्विकेंद्रकी |
Codes:
|
A |
B |
C |
D |
|
|
(1) |
4 |
3 |
2 |
1 |
|
(2) |
2 |
1 |
4 |
3 |
|
(3) |
1 |
2 |
4 |
3 |
|
(4) |
3 |
1 |
4 |
2 |
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
1. Epidendrum secundum
2. Vanilla planifolia
3. Ophrys apifera
4. Dactylorhiza sambucina
1. 1
2. 2
3. 4
4. 7
1. the development of fruit without fertilization
2. production of seeds without fertilization
3. unfertilized eggs developing into males
4. unfertilized eggs developing into females
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