in my ecological studies we saw 2 strategies of reproduction .
strategy "K " and strategy "R" .
one is a lot of babies with no care and a lot will die ,and the opposite is few babies but few will die .
indica strategy is to produce few seeds with a lot of reserves .and strong since the beginning .
sativas do the opposite ,thousands of seeds ,with no reserve and pretty slow at first .
english is not my first language so i won't explain more
but search on the web for development strategy K and R