If a seed is defined as an ovule modified as a result of fertilization, one may expect to find seed in:
All vascular plants
Angiosperm only
Gymnosperm only
Phanerogams
What happens with the remaining other ovules ...if many ovules are present in a flower.....as fertilisation takes place only in one ovule ....so how it is possible to make many seeds by just one fusion with one ovule?