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Q. No.What would be the arrangement of floral whorls on the thalamus of a complete flower beginning from the innermost:
1. Calyx, corolla, androecium and gynoecium
2. Calyx, corolla, gynoecium and androecium
3. Gynoecium, androecium, corolla and calyx
4. Androecium, gynoecium, corolla and calyx
Subtopic: Flower & Parts of Flower |
73%
From NCERT
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Select the pair representing true homologous structures in the embryos of a typical dicot and a grass:
1. Coleorhiza and coleoptile
2. Coleoptile and scutellum
3. Cotyledons and scutellum
4. Hypocotyl and radicle
1. Coleorhiza and coleoptile
2. Coleoptile and scutellum
3. Cotyledons and scutellum
4. Hypocotyl and radicle
Subtopic: Seed |
74%
From NCERT
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In swampy areas like the Sunderbans in West Bengal, plants bear special kind of roots called
| 1. | Prop roots | 2. | Tuberous roots |
| 3. | Pneumatophores | 4. | Moniliform roots |
Subtopic: Modification of Roots |
93%
From NCERT
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The presence of stellate (star-shaped) hairs on the leaves, stems, and other parts of the plant is an important feature of the plants belonging to:
| 1. | Poaceae | 2. | Malvaceae |
| 3. | Solanaceae | 4. | Cruciferae |
Subtopic: Families of Flowering Plant |
55%
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In an inflorescence where flowers are borne laterally in an acropetal succession, the position of the youngest floral bud in the floral axis shall be:
1. at the apex or the topmost point of the inflorescence
2. at the base or the bottom of the inflorescence
3. intercalary
4. anywhere
1. at the apex or the topmost point of the inflorescence
2. at the base or the bottom of the inflorescence
3. intercalary
4. anywhere
Subtopic: Inflorescence |
81%
From NCERT
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How many of the given pairs are correctly matched?
I: Alternate phyllotaxy: Mustard
II: Leaf tendril: Cacti
III: Leaf spine: Pea
1. 0
2. 1
3. 2
4. 3
I: Alternate phyllotaxy: Mustard
II: Leaf tendril: Cacti
III: Leaf spine: Pea
1. 0
2. 1
3. 2
4. 3
Subtopic: Venation, Types of Leaves & Phyllotaxy | Modification of Leaf |
71%
From NCERT
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The lateral branches originate from the basal and underground portion of the main stem, grow horizontally beneath the soil, and then come out obliquely upward giving rise to leafy shoots in
1. Pistia and Eichhornia
2. Pineapple and Chrysanthemum
3. Mint and Jasmine
4. Opuntia and Euphorbia
1. Pistia and Eichhornia
2. Pineapple and Chrysanthemum
3. Mint and Jasmine
4. Opuntia and Euphorbia
Subtopic: Modifications of Stem |
59%
From NCERT
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Stem is modified into a fleshy cylindrical structure in:
| 1. | Euphorbia | 2. | Pistia |
| 3. | Citrus | 4. | Bougainvillea |
Subtopic: Modifications of Stem |
89%
From NCERT
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Which of the following refer to individual components of a floral whorl?
i. Androecium
ii. Carpel
iii. Corolla
iv. Sepal
1. i and iv
2. iii and iv
3. ii and iv
4. i and ii
i. Androecium
ii. Carpel
iii. Corolla
iv. Sepal
1. i and iv
2. iii and iv
3. ii and iv
4. i and ii
Subtopic: Flower & Parts of Flower |
From NCERT
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Micropyle present in a seed coat is important for:
| 1. | Protection of the embryo |
| 2. | Facilitation of water and oxygen entry during germination |
| 3. | Allowing the pollen tube to emerge out of the embryo sac |
| 4. | Induction of dormancy in the embryo |
Subtopic: Seed |
78%
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