BIOL 152 9thEdition Lecture 13 Outline of Last Lecture I Progressing Towards Plants II Green Algal Ancestors III Necessary Adaptations for Life on Land Outline of Current Lecture I Byrophytes Key Innovators II Stem Anatomy III Seedless Vascular Plants IV Evolutionary Changes V Ferns VI Evolutionary Innovations Current Lecture I II III Bryophytes Key Innovators Sporophyte evolution the plant that produces spores o Embryo phase o Dependency on the gametophyte o Advantages Protection from desiccation doesn t have to photosynthesize Increased spore production Stoma pores and cuticle o How did a waxy cuticle evolve Mutation in gene somewhere Evolutionary advantage protected from drying out Disadvantage cuticle prevents CO2 from coming in Stem Anatomy Conducting tissue o Hydroids translocation of water o Leptoids sugar movement Seedless Vascular Plants How are these different from Bryophytes o Doesn t produce seeds o Has vascularized tissues These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute IV V VI Evolutionary Changes Microphylls o 410 million yrs ago o Single vein o Lycophytes club moss is not Moss Ferns Phylum Pterophyta Dominant sporophyte o Rhizome underground stem o Fronds megaphylls Photosynthesis Reproduction Evolutionary Innovations True stems Vascular tissue o Xylem dead Water minerals Tracheids Lignin o Phloem Sugar Long lived dominant sporophytes