Q. No.Consider the two statements:
| I: | Lifespan of living organisms are correlated with their body size |
| II: | Almost always, larger the body size more will be the lifespan |
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 and II is incorrect.
4. Both I and II are incorrect.
There is no natural death in single-celled organisms like Amoeba and bacteria because:
1. They cannot reproduce sexually
2. They reproduce by binary fission
3. Parental body is distributed among the offspring
4. They are microscopic
| 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. |
The term ‘clone’ cannot be applied to offspring formed by sexual reproduction because:
| 1. | Offspring do not possess exact copies of parental DNA |
| 2. | DNA of only one parent is copied and passed on to the offspring |
| 3. | Offspring are formed at different times |
| 4. | DNA of the parent and offspring are completely different. |
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 |
Match the asexual reproductive structure in COLUMN I with organisms in COLUMN II and select the correct option from the codes given:
|
|
COLUMN I |
|
COLUMN II |
|
A. |
Zoospore |
a. |
Penicillium |
|
B. |
Conidia |
b. |
Chlamydomonas |
|
C. |
Buds |
c. |
Sponge |
|
D. |
Gemmule |
d. |
Hydra |
| Options: | (A) | (B) | (C) | (D) |
| 1. | a | b | c | d |
| 2. | d | c | b | a |
| 3. | c | d | a | b |
| 4. | b | a | d | c |
Match vegetative propagules in COLUMN I with plants in COLUMN II and select the correct option from the codes given:
|
|
COLUMN I |
|
COLUMN II |
|
A. |
Rhizome |
a. |
Bryophyllum |
|
B. |
Bulbil |
b. |
Eichhornia |
|
C. |
Leaf buds |
c. |
Ginger |
|
D. |
Offset |
d. |
Agave |
| Options: | (A) | (B) | (C) | (D) |
| 1. | a | b | c | d |
| 2. | d | c | b | a |
| 3. | c | d | a | b |
| 4. | b | a | d | c |
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 |
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. |
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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