Anoxygenic photosynthesis is characteristic of:
1. Rhodospirillum
2. Spirogyra
3. Chlamydomonas
4. Ulva
A few normal seedlings of a tomato were kept in a dark room. After a few days, they were found to have become white-coloured like albinos, Which of the following terms will you use to describe them?
1. Mutated
2. Embolised
3. Etiolated
4. Defoliated
Which one of the following growth regulators is known as the stress hormone?
| 1. | Abscisic acid | 2. | Ethylene |
| 3. | GA3 | 4. | Indole acetic acid |
Geitonogamy involves:
| 1. | Pollination of a flower by the pollen from another flower of the same plant. |
| 2. | Pollination of a flower by the pollen from another same flower. |
| 3. | Pollination of a flower by the pollen from a flower of another plant in the same population. |
| 4. | Pollination of a flower by the pollen from a flower of another plant belonging to a distant population. |
1. Pteris
2. Funaria
3. Lilium
4. Pinus
An aggregate fruit is one which develops from:
1. Multicarpellary syncarpous gynoecium
2. Multicarpellary apocarpous gynoecium
3. Complete inflorescence
4. Multicarpellary superior ovary
Pollen tablets are available in the market for:
| 1. | In vitro fertilization | 2. | Breeding programmes |
| 3. | Supplementing food | 4. | Ex-situ conservation |
Function of filiform apparatus is to:
| 1. | Recognize the suitable pollen at the stigma |
| 2. | Stimulate division of generative cell |
| 3. | Producer nectar |
| 4. | Guide the entry of the pollen tube |
Which of the following shows coiled RNA strand and capsomeres?
| 1. | Poliovirus | 2. | Tobacco mosaic virus |
| 3. | Measles virus | 4. | Retrovirus |
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