Angiosperms and Gymnosperms

Angiosperms and Gymnosperms
The seed bearing plants are broadly divided into a single class known as Sprematophyta, which is further sub-divided into angiosperms and gymnosperms. The word gymnosperm is derived from Greek word gymnospermos, meaning 'naked seed'. Angiosperms and gymnosperms are both seed bearing plants. Although, differences are more distinct, the points mentioned below are some of the similarities between them.
* They are capable of producing pollen for fertilization and their fertilization is siphonogamous, i.e through a pollen tube. Gymnosperms mostly depend on wind pollination and some angiosperms are also dependent on the same agent.
* The sporophyte of angiosperms and gymnosperm is differentiated into root, stem and leaves. * Apart from primary growth, their stem undergoes expansion by secondary growth.
* Like angiosperms, gymnosperms also have vessels and companion cells. The vascular system is common for the both of them consisting of conjoint and vascular bundles (open and collateral).
* Ovules of angiosperms and gymnosperms develop into seeds. The mode of seed germination is epigeal and hypogeal or both.
* One distinct similarity is, reduced gametophytic phase of both angiosperms and gymnosperms.
* Polyembryony, a common feature of gymnosperms is also prevalent in some angiosperms and a suspensor is formed during the embryo development phase.