DDT residues are rapidly passed through food chain causing biomagnification because DDT is:
1. lipo soluble
2. moderately toxic
3. non-toxic to aquatic animals
4. water soluble
Which one of the following is a vascular cryptogam?
| 1. | Equisetum | 2. | Ginkgo |
| 3. | Marchantia | 4. | Cedrus |
Steps taken by the Government of India to control air pollution include:
| 1. | compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel |
| 2. | compulsory PUC (Pollution Under Control) certification of petrol driven vehicles, which tests for carbon monoxide and hydrocarbons |
| 3. | permission to use only pure diesel with a maximum of 500 ppm Sulphur as fuel for vehicles |
| 4. | use of non-polluting Compressed Natural Gas(CNG) only as fuel by all buses and trucks |
Montreal protocol aims at:
1. reduction of ozone depleting substances
2. biodiversity conservation
3. control of water pollution
4. control of CO2 emission
Which one of the following acids is a derivative of carotenoids?
1. Indole-butyric acid
2. Indole-3-acetic acid
3. Gibberellic acid
4. Abscisic acid
Guard cells help in:
| 1. | protection against grazing |
| 2. | transpiration |
| 3. | guttation |
| 4. | fighting against infection |
Cotyledons and testa are edible parts of:
1. groundnut and pomegranate
2. walnut and tamarind
3. french bean and coconut
4. cashew nut and litchi
Which one of the following is considered important in the development of seed habit?
| 1. | Dependent sporophyte | 2. | Heterospory |
| 3. | Halplontic life cycle | 4. | Free-living gametophyte |
T.O. Diener discovered a:
1. free infectious RNA
2. free infectious DNA
3. infectious protein
4. bacteriophage
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