Answer is the phylum is Pteridophyta. Pteridophytes are first land plants, examples ferns, <em>Lycopodium, Selaginella. </em>Members have liginified cells and developed conducting tissues called vascular system to conduct water and synthesized food. They reproduce through spores, seeds do not develop in pteridophytes.
They were brought to Australia to assist the exploration of inland Australia.
It is called a scientific method.
As we burn fossil fuels, which are carbon containing compounds, for fuel, we increase atmospheric carbon dioxide at a rate faster than carbon-fixing components of the cycle, like plants, can use it, leading to increased carbon dioxide.
