Evolutionary history of plants foliage consisted of fern-like fronds, although they were not closely related to ferns. The oldest fossil evidence of seed plants is of Late Devonian age, and they appear to have evolved out of an earlier group known as the progymnosperms. These early seed plants ranged from trees to small, rambling shrubs; like most early progymnosperms, they were woody plants with fern-like foliage. They all bore ovules, but no cones, fruit or similar. While it is difficult to track the early evolution of seeds, the lineage of the seed ferns may be traced from the simple trimerophytes through homosporous Aneurophytes. This
The Private Life of Plants lead to the prey developing methods of self-defence — from plants growing spikes to insects learning to recognise mimicry. Yet humans can work around all these rules of nature, so Attenborough concludes with a plea to preserve plants, in the interest of self-preservation. In the 2002 documentary "Life on Air", Keith Scholey, the head of the BBC Natural History Unit, relates that he and his team had been wondering about an ecology series that included plants, and found that Attenborough had been thinking along the same lines: "So we went to his house and David, as always, listened to our