To produce 60 embryo sac how many meiotic and mitotic divisions are required?

Dear student,    
​Please find below the link to the asked query                                                                   

https://www.meritnation.com/ask-answer/question/how-many-meiotic-and-mitotic-divisions-would-microspore-moth/sexual-reproduction-in-flowering-plants/9246791

So, for the formation of 60 embryo sacs, 60 meiotic and 180 (3x60) mitotic divisions will be required.
 
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