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  1. During the process of fertilization, when one nucleus fuses with egg and
  2. Cellular organelles with membranes are :
  3. The scutellum obsorved in a grain of wheat or maize is comparable to which part
  4. Male and female gametophytes are independent and free living in
  5. If there are 4 cells in anthers, what will the number of pollen grains?