The major difference between angiosperms and gymnosperms comes from the

Reproductive structures and seeds.

Explanation:

In angiosperms, the reproductive structures are flowers and seeds are contained in a dispersal structure (ovary) that then becomes a fruit. On the other hand, gymnosperms have naked seeds which are not contained in a fruit. Also, angiosperms develop flowers while gymnosperms don't.

explanation:

mitosis is used to produce daughter cells that are genetically identical to the parent cells. the cell copies - or 'replicates' - its chromosomes, and then splits the copied chromosomes equally to make sure that each daughter cell has a full set.