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Q. No.Regarding the aestivations shown in the given figure:
I:
A is seen in Calotropis.
II:
B is seen in Pea.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Flower & Parts of Flower |
75%
From NCERT
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| Assertion (A): | Pneumatophores are critical for the survival of certain mangrove species, including Rhizophora. |
| Reason (R): | Mangrove plants live in unique habitat, which is characterized by waterlogged and often anoxic soil conditions and pneumatophores help in respiration under such conditions. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Modification of Roots |
92%
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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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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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
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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