BIO SCI 94 Lecture 15: Green Algae and Land Protist Part 2
10 Feb 2019
School
Department
Course
Professor
BIO SCI 94 verified notes
15/27View all
Document Summary
Coal deposits found in sediments 359-299 mya. Rocks 416-359 mya, fossils found from major plant lineages. All adaptations for plants to live on land include: Coal-carbon rich rock with fossil spores, branches, leaves and tree trunks. Present day 5 major groups of gymnosperms: Wet and dry environments filled with green plants. Flowering plants appear 150 mya, continue to diversify today. First flowering plants ancestor of grass, orchid, daisies, oaks, maples, roses. Green algae first, next vascular plants, seedless vascular plants, and seed plants. Late fossil record organisms less dependent on moist habitats. Land plant evolution needed adaptations for photosynthetic organisms to move from water to land. Plants adapt to where only part of tissue wet. Tissue meet air dry out and die. Natural selection prefer plants that resist drying problem. Green plants survive on land light, carbon dioxide more abundant. Allows plant to survive in dry habitats. Guard cell change shape pore opens or closes.
