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Q. No.Consider the two statements:
| Assertion (A): | Prop and stilt roots are aerial in origin yet they are called roots. |
| Reason (R): | These roots are modified to provide mechanical support |
| 1. | Both (A) and (R) are True but (R) does not correctly explain the (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True and (R) correctly explains the (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Â Modification of Roots |
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Although a root system performs many functions, a fibrous root system may especially be excellent for:
| 1. | storage of food |
| 2. | absorbing water from the deeper layers of soil |
| 3. | nitrogen fixation |
| 4. | providing good anchorage to the plant |
Subtopic: Â Morphology of Roots |
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Identify the correct statement(s) regarding the modifications seen in stems:
| I: | Stem tendrils develop from axillary buds and help plants, such as pea, to climb |
| II: | Opuntia modifies its stems into flattened structures to protect itself from browsing animals |
| III: | Underground stems of some plants such as grass and strawberry spread to new niches and when older plants die, new plants are formed. |
| 1. | I, II, and III |
| 2. | Only II and III |
| 3. | Only III |
| 4. | Only I and III |
Subtopic: Â Modifications of Stem |
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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: Â Modifications of Stem |
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Thorns are
1. a and b only
2. b and c only
3. a and c only
4. All a, b and c
| a. | Modified axillary buds |
| b. | Found in Citrus |
| c. | Modifications of stem to protect plants from browsing animals |
2. b and c only
3. a and c only
4. All a, b and c
Subtopic: Â Morphology of Stems |
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Given below are two statements:
| Assertion (A): | Leaves showing parallel venation are found in monocotyledonous plants |
| Reason (R): | In leaves showing parallel venation, the veins run parallel to one another, veinlets are inconspicuous and reticulations are absent |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Morphology of Leaf |
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In legumes, the pulvinus:
| 1. | enables rapid leaf movement in response to touch (thigmonasty) |
| 2. | assists in water conservation by folding the leaves during drought |
| 3. | helps protect the plant by producing toxic compounds |
| 4. | promotes gas exchange by moving the leaves away from each other |
Subtopic: Â Modification of Leaf |
Level 3: 35%-60%
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Identify the incorrect statement about racemose inflorescence:
| 1. | The main axis continues to grow. |
| 2. | Flowers are borne acropetally on the axis. |
| 3. | It is a type of compound inflorescence. |
| 4. | The youngest flower is at the apex. |
Subtopic: Â Inflorescence |
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Consider the given two statements:
| Assertion(A): | In cymose type of inflorescence, the main axis is limited in growth. |
| Reason (R): | In cymose type of inflorescence, the flowers are borne in a basipetal order. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Â Inflorescence |
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Identify the incorrectly matched pair:
| 1. | Having the sepals united | Gamosepalous |
| 2. | Sterile stamen | Staminate |
| 3. | Stamens attached to perianth | Epiphyllous |
| 4. | Having the carpels of the gynoecium fused in a compound ovary | Syncarpous |
Subtopic: Â Flower & Parts of Flower |
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