Q. No.The ability to produce adventitious buds is exploited by gardeners for commercial propagation of:
1.
Bryophyllum
2.
Agave
3.
Water hyacinth
4.
Ginger
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Encystation during unfavorable conditions followed by multiple fission and sporulation when favorable conditions return is seen in:
| 1. | Sponges | 2. | Penicillium |
| 3. | Amoeba | 4. | Hydra |
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Corresponding to ‘monoecious’ in a plant, the bisexual condition in a fungus would be best described as:
| 1. | Homothallic | 2. | Heterothallic |
| 3. | Hermaphrodite | 4. | Complete ad perfect |
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Consider the two statements:
| I: | Eichhornia crassipes, the ‘terror of Bengal’ is an invasive weed. |
| II: | It was introduced in India for its beautiful flower and shape of leaves. |
| 1. | Both I and II are correct and II explains I. |
| 2. | Both I and II are correct but II does not explain I. |
| 3. | I is correct but II is incorrect. |
| 4. | I is incorrect but II is correct. |
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With the advent of adverse conditions, an organism capable of reproducing both asexually and sexually, will most likely:
| 1. | shift to asexual mode of reproduction |
| 2. | shift to sexual mode of reproduction |
| 3. | equally reproduce by both modes |
| 4. | die |
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In the given diagrams each part A, B, C and D shows a reproductive structure in an organism marked as ‘X’. Select the option where all parts are correctly matched:
|
A. |
 |
B. |  |
|
B. |
 |
D. |  |
| 1. | A: Oogonium of Chara; B: Archegoniophore of Marchantia; C: Conidia of Penicillium; D: Offset of Eicchornia |
| 2. | A: Antheridium of Chara; B: Antheridiophore of Marchantia; C: Sporangiophores of Penicillium; D: Offset of Eicchornia |
| 3. | A: Oogonium of Chara; B: Antheridiophore of Marchantia; C: Conidia of Penicillium; D: Offset of Eicchornia |
| 4. | A: Antheridium of Chara; B: Archegoniophore of Marchantia; C: Conidia of Penicillium; D: Stolon of Eicchornia |
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| Statement I: | When offspring is produced by a single parent but always with the involvement of gamete formation, reproduction is asexual. |
| Statement II: | When two parents [opposite sex] participate in the reproductive process and also involve the fusion of male and female gametes, it is called sexual reproduction. |
| 1. | Statement I is correct, Statement II is incorrect. |
| 2. | Statement I is correct, Statement II is correct. |
| 3. | Statement I is incorrect, Statement II is correct. |
| 4. | Statement I is incorrect, Statement II is incorrect. |
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| Statement I: | Animals that have oestrous cycles resorb the endometrium if conception does not occur during that cycle and animals that have menstrual cycles shed the endometrium through menstruation instead. |
| Statement II: | In species with oestrous cycles, females are generally only sexually active during the oestrus phase of their cycle and females of species with menstrual cycles can be sexually active at any time in their cycle, even when they are not about to ovulate. |
| 1. | Statement I is correct, Statement II is incorrect. |
| 2. | Statement I is correct, Statement II is correct. |
| 3. | Statement I is incorrect, Statement II is correct. |
| 4. | Statement I is incorrect, Statement II is incorrect. |
| 1. | A is the female thallus of Marchantia and B is the male thallus of Marchantia |
| 2. | A is the male thallus of Marchantia and B is the female thallus of Marchantia |
| 3. | A is the female thallus of Chara and B is the male thallus of Chara |
| 4. | A is the male thallus of Chara and B is the female thallus of Chara |
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