brief history of kingdom Plantae
It would be hard
to present pollen and spores without any mention of plants. Pollen and spores
are small but very important components that are part of the plant reproduction
mechanism. Moreover, this reproductive system for plants is better represented
through a model of descent with modification since the plant kingdom is believed
to be monophyletic by some scientists (This is debated), meaning that all plant species are derived from a common ancestor.