Define 
  • Pollination.                                     
  • cross Pollination.
  • Asexual reproduction.                           
  • Grafting
  • Stock
  • Scion
  • Vegetative propagation.  
  • Self  Pollination.
  •  Sexual reproduction.
  • Funiculus.
  • Syngamy.
  • Xenogamy.
  • Allogamy.  

Dear student, 
Please find below the links to the asked query 

https://www.meritnation.com/ask-answer/question/pollination/getting-to-know-plants/573823
https://www.meritnation.com/ask-answer/question/explain-the-difference-between-self-pollination-and-cross/reproduction-in-plants/6290664
https://www.meritnation.com/ask-answer/question/what-is-grafting/reproduction-in-plants/6872041

​Please post separte queries in separate threads.
Hope this links will clear your doubts about the topic. 
If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible. 
  
Regards    

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