Question -
Answer -
The reasons for distinguishing angiosperms and gymnosperms are as follows.
(i) In gymnosperms, the ovules are naked but in angiosperms they are enclosed within the ovary
(ii) In Gymnosperms endospore is haploid and produced before fertilization whereas in Angiosperms endosperm is triploid and formed after double fertilization.
(iii) Double fertilization does not occur in gymnosperms, but in angiosperms, double fertilization occurs.
(iv) In gymnosperms, wood is nonporous and in angiosperms wood is porous.