Q. No.Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because:
1.
Nodes are shorter than internodes
2.
Nodes have meristematic cells
3.
Nodes are located near the soil
4.
Nodes have non-photosynthetic cells
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Which of the following statements supports the view that elaborate sexual reproductive processes appeared much later in organic evolution?
| i. | Lower groups of organisms have a simpler body design |
| ii. | Asexual reproduction is common in lower groups |
| iii. | Asexual reproduction is common in higher groups of organisms |
| iv. | The high incidence of sexual reproduction in angiosperms and vertebrates |
| 1. | i, ii, and iii | 2. | i, iii, and iv |
| 3. | i, ii, and iv | 4. | ii, iii, and iv |
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Offspring formed by sexual reproduction exhibit more variation than those formed by Asexual reproduction because:
| 1. | Sexual reproduction is a lengthy process |
| 2. | Gametes of parents have a qualitatively different genetic composition |
| 3. | Genetic material comes from parents of two different species |
| 4. | Greater amount of DNA is involved in sexual reproduction |
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There are various types of reproduction. The type of reproduction adopted by an organism depends on:
| 1. | The habitat and morphology of the organism |
| 2. | Morphology of the organism |
| 3. | Morphology and physiology of the organism |
| 4. | The organism’s habitat, physiology, and genetic makeup |
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Identify the incorrect statement :
| 1. | In asexual reproduction, the offspring produced are morphologically and genetically identical to the parent |
| 2. | Zoospores are sexual reproductive structures |
| 3. | In asexual reproduction, a single parent produces offspring with or without the formation of gametes |
| 4. | Conidia are asexual structures in Penicillium |
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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 |
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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 |
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Which of the given two statements regarding vegetative reproduction in plants is/are true?
| I: | It is also a type of asexual reproduction |
| II: | The term clone is applicable to the offspring formed by vegetative reproduction in most cases. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
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Consider the two statements:
| I: | Organisms like algae and fungi shift to a sexual mode of reproduction just before the onset of adverse conditions. |
| II: | In sexual reproduction large number of progeny can be produced in a short span of time. |
| 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. |
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