Review of “Plant Evolution Tour” - Part 4 (Conclusion)
Sunday, July 29th, 2007
Our final installment on the “Plant Evolution Tour” brings us to God’s stated purpose for Day 3… the development of seeded plants. This includes grass and trees.
…it was during the late Devonian between 395-286Ma that seeds developed (to replace spores). This was a major evolutionary advance, because it eliminated the requirement for external sources of water for sexual reproduction of plants. It also provided better protection and a nutrient source for the developing embryo. This process of development is thought to have started with the conversion of plants from producing spores of one size (homospory) to producing spores of two sizes (heterospory). It is thought that the larger spores were precursors for ovules, and the smaller ovules precursors for pollen. – …