CBSE Class 12-science Biology Prefertilisation: Structures and Events

• what is pollen secs
• give reason why endosperm is formed in all the Angiospermic plants?
• what is dicot plant
• sir/madam, is theca same as the loes of the anther of an angiospermic plant?
• why does the pollen grain not disintegrate in adverse environmental condition
• difference between sporogenoes tissue and pollen mother cell
• microsporogenesis
• pls explain me how the ovules are arranged in gymnosperm and how is it different from angiosperm  
• EXPLAIN MEGASPOROGENESIS FOR 5 MARKS IN DETAIL WITH THE HELP OF DIAGRAM
• EXPLAIN MICROSPOROGENESIS FOR 5 MARKS WITH  DIAGRAM   

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