Q. No.What would be the number of chorosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells?
(1) 63
(2) 84
(3) 21
(4) 42
Which of the following animals is not viviparous?
1. Flying fox (bat)
2. Elephant
3. Platypus
4. Whale
Monoecious plant of Chara shows occurrence of
(1) antheridiophore and archegoniophore on the same plant
(2) stamen and carpel on the same plant
(3) upper antheirdium and lower oogonium on the same plant
(4) upper oogonium and lower antheridium on the same plant
The 'Eyes' of the potato tuber are
(1) flower buds
(2) shoot buds
(3) axillary buds
(4) root buds
Which one of the following is wrong about Chara?
(1) Upper oogonium, and lower round anthredium
(2) Globule and nucule present on the same plant
(3) Upper anthredium and lower oogonium
(4) Globule is male reproductive structure
Match Column I with column II and select the correct option using the codes given below:
|
|
Column I |
|
Column II |
|
A. |
Pistils fused together |
1. |
Gametogenesis |
|
B. |
Formation of gametes |
2. |
Pistillate |
|
C. |
Hyphae of higher ascomycetes |
3. |
Syncarpous |
|
D. |
Unisexual female flower |
4. |
Dikaryotic |
Codes:
|
|
A |
B |
C |
D |
|
(1) |
4 |
3 |
2 |
1 |
|
(2) |
2 |
1 |
4 |
3 |
|
(3) |
1 |
2 |
4 |
3 |
|
(4) |
3 |
1 |
4 |
2 |
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 |
2. Jackfruit
3. Mango
4. Papaya
Which one of the following generates new genetic combinations leading to variation?
1. Vegetative reproduction
2. Parthenogenesis
3. Sexual reproduction
4. Nucellar polyembryony
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