after pollination and fertilization occurs the ovule develops into a ?

Since this is not my area of expertise, I searched Google under the key words "fertilization ovule" to get these possible sources:

http://en.wikipedia.org/wiki/Ovule
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/A/Angiosperm.html

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

I hope this helps. Thanks for asking.