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Q. No.Which of the following is called as the "bee orchid" due to the flowers resembling the furry bodies of bees?
1. Epidendrum secundum
2. Vanilla planifolia
3. Ophrys apifera
4. Dactylorhiza sambucina
Subtopic: Pollination & Outbreeding Devices |
79%
From NCERT
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At the four nucleate stage, the number of cells present in a female gametophyte of a typical angiosperm is:
| 1. | 1 | 2. | 2 |
| 3. | 4 | 4. | 7 |
Subtopic: Pistil: Female Gametophyte |
From NCERT
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Subtopic: Pollination & Outbreeding Devices |
92%
From NCERT
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Apomixis is:
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
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
Subtopic: Apomixis & Polyembryony |
86%
From NCERT
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Subtopic: Pollination & Outbreeding Devices |
89%
From NCERT
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Filiform apparatus is a part of:
| 1. | synergids at the chalazal end of the female gametophyte |
| 2. | antipodals at the chalazal end of the female gametophyte |
| 3. | synergids at the micropylar end of the female gametophyte |
| 4. | antipodals at the micropylar end of the female gametophyte |
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
86%
From NCERT
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Thalamus does not contribute to the formation of fruit in:
1. Apple
2. Strawberry
3. Cashew
4. Banana
1. Apple
2. Strawberry
3. Cashew
4. Banana
Subtopic: Seed |
82%
From NCERT
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Identify the incorrect statement:
| 1. | Pollen sacs are developed microsporangia |
| 2. | Pollen grains are developed microspores |
| 3. | Vegetative cell of the pollen grain is bigger than the generative cell |
| 4. | In over 60 percent of angiosperms pollens are shed at 3-celled stage |
Subtopic: Stamen: Male Gametophyte |
85%
From NCERT
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Phoenix dactylifera is commonly known as:
| 1. | Deadly nightshade | 2. | Date palm |
| 3. | Lupine | 4. | Methuselah |
Subtopic: Seed |
86%
From NCERT
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In grass embryos, a flap-like structure present opposite to the scutellum is called as:
1. coleoptile
2. coleorrhiza
3. epiblast
4. hypoblast
1. coleoptile
2. coleorrhiza
3. epiblast
4. hypoblast
Subtopic: Embryo |
57%
From NCERT
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