If a plant is dioecious,which of the following techniques is not required for hybridization?

In which type of plants is emasculation not required?

How is emasculation performed?

Given below are the events that are observed in an artificial hybridization programme. Arrange them in the correct sequential order in which they are followed in the hybridisation programme. $(a)$ Re-bagging $(b)$ Selection of parents $(c)$ Bagging $(d)$ Dusting the pollen on stigma $(e)$ Emasculation $(f)$ Collection of pollen from male parent.

Give scientific reasons: Artificial hybridisation is one of the major approaches of crop improvement programme.

In grafting,which of the following is formed first at the junction of the stock and scion?