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  1. All population in a given physical area are defined as
  2. Most common ovule, having funiculus lying close to the micropyle is called
  3. During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning
  4. Which one of the following is not a sensory structure in cockroach
  5. Guttation is the release of liquid water from veins at leaf margins. It is caused by