Which of the following was most influential upon Darwin's formulation of theory of natural selection?
1). De Vries concept of mutation
2). Wallace's paper on survival
3). Malthus's essay on population
4). Lamarck's on inheritance of acquired characters
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1. Which of the following metals occurs In free state ?
2. Dry ice is
3. Mutations used in agriculture are
4. Radioactive disintegration of uranium ultimately results in formation of
5. The presence of ozone in the stratosphere is responsible for
6. The weakest of all fundamental forces is
7. What is the maximum Water Vapour content in the atmosphere?
8. Who suggested that most of the mass of the atom is located in the nucleus?
9. Which type of fire extinguisher is used for petroleum fire?
10. Mesophyll tissue is well differentiated into spongy tissue and palisade tissue in