Which one of the following statements is not correct?
1. | Offspring produced by asexual reproduction is called clone |
2. | Microscopic motile asexual reproductive structures are called zoospores |
3. | In potatoes, bananas, and ginger, the plantlets arise from the internodes present in the modified stem |
4. | Water hyacinth growing in standing water drains oxygen from water that leads to the death of fish |
Offsets are produced by:
1. | Meiotic divisions |
2. | Mitotic divisions |
3. | Parthenocarpy |
4. | Parthenogenesis |
Which one of the following generates new genetic combinations leading to variation?
1. Vegetative reproduction
2. Parthenogenesis
3. Sexual reproduction
4. Nucellar polyembryony
Flowers are unisexual in?
1. Pea
2. Cucumber
3. China rose
4. Onion
Which of the following pairs is not correctly matched?
Mode of reproduction | Example | ||
(a) | Offset | (i) | Water hyacinth |
(b) | Rhizome | (ii) | Banana |
(c) | Binary fission | (iii) | Sargassum |
(d) | Conidia | (iv) | Penicilium |
1. a
2. b
3. c
4. d
In ginger vegetative propagation occurs through:
Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism?
A technique of micro-propagation is:
Which one of the following is wrong about Chara?
1. upper oogonium and lower round antheridium
2. Globule and nucule present on the same plant
3. Upper antheridium and lower oogonium
4. Globule is male reproductive structure