Which one of the following generates new genetic combinations leading to variation?
1. Vegetative reproduction
2. Parthenogenesis
3. Sexual reproduction
4. Nucellar polyembryony
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 |
1. A-4 B-3 C-2 D-1
2. A-2 B-1 C-4 D-3
3. A-1 B-2 C-4 D-3
4. A-3 B-1 C-4 D-2
In the majority of angiosperms:
| 1. | egg has a filiform apparatus |
| 2. | there are numerous antipodal cells |
| 3. | reduction division occurs in the megaspore mother cells |
| 4. | a small central cell is present in the embryo sac |
Pollination in water hyacinth and water lily is brought about by the agency of:
| 1. | water | 2. | insects or wind |
| 3. | birds | 4. | bats |
The ovule of an angiosperm is technically equivalent to:
1. megasporangium
2. megasporophyll
3. megaspore mother cell
4. megaspore
Taylor conducted the experiments to prove semi-conservative mode of chromosome replication on:
1. Vinca rosea
2. Vicia faba
3. Drosophila melanogaster
4. E. Coli
The mechanism that causes a gene to move from one linkage group to another is called?
1. inversion
2. duplication
3. translocation
4. crossing-over
A true-breeding plant is:
| 1. | one that is able to breed on its own |
| 2. | produced due to cross-pollination among unrelated plants |
| 3. | near homozygous and produces offspring of its own kind |
| 4. | always homozygous recessive in its genetic constitution |
Which of the following rRNA acts as structural RNA as well as ribozyme in bacteria?
| 1. | 5S rRNA |
| 2. | 18S rRNA |
| 3. | 23S rRNA |
| 4. | 5.8S rRNA |
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