BIOA02H3 Lecture Notes - Lecture 1: Azolla, Eukaryote, Lycopodiophyta
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BIOA02H3 Full Course Notes
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Document Summary
All species of life are grouped into three domains: bacteria, archaea, eukarya. Bacteria evolved about 3600 million years ago where they led a solitary life until more advanced life forms showed up. Green algae evolved about 1200 million years ago: were able to fully photosynthesize, autotrophic, were ancestors of plants. Alternation of generations: a haploid phase and a diploid phase. Most advanced and the smallest branch of bryophytes. Bryophytes are characterized by what characters they lack when compared to vascular plants: they lack waxy cuticles which seal the leaf against water loss. They lose & uptake water along whole surface. They are abundant in areas with a lot of rain. British columbia vs ontario: lack of a vascular system in bryophytes whereas in vascular plants the system of xylem and phloem are used to transport water and sugar, respectively. In bryophytes, the cells are not specialized for this transport system so not an efficient water/nutrient transport systems.
