Differentiation between microsporogenesis and megasporogenesis

Microsporogenesis......................... is the formation of microspores from Pollen mother cells through meiosis ..........................microspore which are formed are arranged as tetrad .................. so whenever the anther dehydrates these tetrads got separated out and four different pollen grains are formed ...........................and these pollen grains are generally spherical ...........................and comprises of two layers outer one is called exine ...................which is made up of sporopollenin......................... which is one of the most resistant chemical in the world .....................inner one intine is made up of cellulose and pectin.................................... megasporogenesis is very simple............... in the nucellus cells meiosis occur four cells are formed three of them degenerate........................ one is functional the one which is functional undergo Mitosis to form two nuclei........... then 4 nuclei then 8 celled stage ...............................out of the 8 nuclei 6 of them are organised by well developed cell wall.................. but the central one which are the two polar nuclei and enclosed by cell wall and there occurs a condition of 8 nuclei 7 cells....................... since there are three fusions happening 1 fusion with egg cell to form zygote ......................one fusion with first polar nuclei ....................second fusion with second polar nuclei................. it is termed as triple fusion ...............collectively the fertilization happening one with egg and one with whole polar nuclei to form primary endosper nucleus which is required for the development of the zygote.........?

Microsporogenesis	Megasporogenesis
1.	It is the process of the formation of microspore tetrads from a microspore mother cell through meiosis.	It is the process of the formation of the four megaspores from a megaspore mother cell in the region of the nucellus through meiosis
2.	It occurs inside the pollen sac of the anther.	It occurs inside the ovule.