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1. Flippers of Penguins and Dolphins are an example ofa) Natural selection b) Adaptive radiation c) Analogous organs d) Homologous organs
2. Theory of panspermia:a) Creation of life from dead and decaying matter b) Creation of life from chemicals c) Creation of life from pre-existing life d) Creation of life from spores
3. Chemical evolution theory is also known asa) Cosmozoic theory b) Oparin- Haldane’s theory c) Miller and Urey theory d) Creation theory
4. What type of selection will be observed if the distribution of neck length shifted to favour individuals with long neck?a) Stabilising selection b) Directional selection c) Disruptive selection d) Both A and C
5. Archaeopteryx fossil shows link betweena) Birds and fishes b) Reptiles and mammals c) Fishes and amphibians d) Reptiles and birds
6. Which of the following is used to measure pollutants in the water body?(a) Helium level in the water (b) Calcium level (c) BOD (d) All of these
7. Bacillus thuringiencis kills the pest by releasing toxins in the(a) Brain of pests (b) Gut of pests (c) Heart of pests (d) Lungs of pests
8. Which of the following can be controlled by using biopesticides?(a) Aphids(b) Grasshoppers (c) Beetles (d) All of these
9. The primary treatment of sewage fails to remove(a) Sand particles(b) Small pebbles (c) Pathogens(d) Plastics
10. Aspergillus niger produces(a) Acetic acid (b) Fumaric acid (c) Lactic acid (d) Citric acid
11. Integrated Pest Management discourages the use of(a) Biological methods (b) Chemical pesticides (c) Mechanical methods (d) All of these
12. Cyclosporin A drug is produced bya) Trichoderma polysporum b) Penicillium notatum c) Manascus purpureus d) Aspergillus niger
13. The first antibiotic was discovered by(a) R Koch (b) Louis Pasteur (c) A Fleming (d) W Fleming
14. In gobar gas, the maximum amount is(a) Propane (b) Methane (c) Butane (d) Carbon dioxide
15. The free-living fungus Trichoderma can be used fora) Biological control of plant disease b) Killing insects c) Controlling caterpillars d) Producing antibiotics
16. Statement I: Biocontrol refers to the use of biological methods for controlling plant diseases and pests. Statement II: Use of biocontrol measures will greatly reduce our dependence on toxic chemical and pesticide. In the light of the above statements, choose the correct answer from the options given below:a) Both Statement I and Statement II are incorrect b) Statement I is correct but Statement II is incorrect c) Statement I is incorrect but Statement II is correct d) Both Statement I and Statement II are correct
17. Which bacteria is involved in biogas production?(a) Staphylococcus(b) Aerobic bacteria (c) Methanogens (d) None of these
18. Biologists consider flowers to be objects ofa) Morphological marvels b) Embryological marvels c) Sites of sexual reproduction d) All of these
19. When does plant decides to flower?a) In embryonic development b) During the appearance of flower buds c) Before the actual flower appear on plant d) All the above
20. Whorl of carpel in flower representsa) Gynoecium b) Androecium c) Calyx d) Corolla