A sedentary sea anemone gets attached to the shell lining of a hermit crab. The association is:
1. Symbiosis
2. Commensalism
3. Amensalism
4. Ectoparasitism
Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?
1. Plant cells- cellulase
2. Algae - Methylase
3. Fungi - Chitinase
4. Bacteria - Lysozyme
Product of sexual reproduction generally generates:
1. Prolonged dormancy
2. New genetic combination leading to variation
3. Large biomass
4. Longer viability of seeds
Which of the following represents maximum number of species among global biodiversity?
1. Lichens
2. Fungi
3. Mosses and Ferns
4. Algae
One of the legal methods of birth control is:
| 1. | by abstaining from coitus from day 10 to 17 of the menstrual cycle |
| 2. | by having coitus at the time of daybreak |
| 3. | by premature ejaculation during coitus |
| 4. | abortion by taking an appropriate medicine |
Which one of the following processes during decomposition is correctly described?
| 1. | Humanification-Leads to the accumulation of a dark-coloured substance in humans which undergoes microbial action at a very fast rate |
| 2. | Catabolism-Last step decomposition under fully anaerobic condition |
| 3. | Leaching-Water soluble inorganic nutrients rise to the top layers of the soil |
| 4. | Fragmentation-Carried out by organisms such as earthworms |
DNA fragments generated by the restriction endonucleases in a chemical reaction can be separated by:
1. Polymerase chain reaction
2. Electrophoresis
3. Restriction mapping
4. Centrifugation
The figure shows a diagrammatic view of the human respiratory system with labels A, B, C, and D. Select the option that gives the correct identification, main function, and/or characteristics:
| 1. | B-pleural membrane- surrounds ribs on both sides to provide cushion against rubbing. |
| 2. | C-alveoli-thin walled vascular bag-like structures for the exchange of gases. |
| 3. | D-lower end of the lungs-diaphragm pulls it down during inspiration. |
| 4. | A trachea-long tube supported by complete cartilaginous rings for conducting inspired air. |
Which one of the following is not used for ex-situ plant conservation?
1. Seed banks
2. Shifting cultivation
3. Botanical Gardens
4. Field gene banks
Lenticels are involved in:
| 1. | Gaseous exchange | 2. | Food transfer |
| 3. | Photosynthesis | 4. | Transpiration |
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