A characteristic of angiosperm is a) double fertilization b) collateral vascular bundle c) radial vascular bundle d) seed formation

Dear student,
Option A is correct.
The characteristic feature of angiosperm is double fertilization.
Double fertilisation-One of the male gametes fuse with egg & the other fuse with polar nuclei to form primary endosperm nucleus in angiosperms.

Hope this information will clear your doubts about topic.

If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.

Regards