After observing the variations HUGO DE VRIES first of all described the mutation in
1). Oenothera lamarl.4ana
2). Neurospora crassa
3). Pisum sativum
4). Drosophila melanogaster
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1. The propagation of sound waves in a gas involves
2. In fireworks, the green flame is produced because of
3. Water pipes in hilly areas often burst on a cold frosty night because
4. Which of the following is the major constituent of LPG?
5. Helium gas is used in gas balloons instead of hydrogen gas because it is
6. The breathing centre in the brain responds to changes in the
7. Which one of the following metals does not react with water to produce Hydrogen ?