Much too long an answere for this site. Put 'Seed Biology' into your search engine and read to your hearts delight!

LOL, I was expecting someone to say it was exam time again Mr B.....

Guess you're right Lincs.....

Take Mr B's advice Ebad, do the research and you'll get better results

Do a Google search. We're not here to do your homework for you. ;)

Its not that I mind someone asking for help to be pointed in the right direction, even if it is for an exam but where is the please in that question.........

Or ever a reply.....
Two more questions above it seems ?

I flagged these questions on the grounds that there were three identical postings. I wondered if it was someone playing around. Glad to see that the other two have now gone.