BIOL 112 Lecture Notes - Lecture 8: Ploidy, Archegonium, Phloem
Document Summary
Source of energy: photo: light, chemoorgano: organic molecules, chemolitho: inorganic molecules. Modern prokaryotes: abundant, ubiquitous, microscopic, reproduce asexually, binary fission, ecological roles, primary producers, decomposers, fixers, bioremediation; clean up oil spills. Archaea more related to eukaryotes: extremophiles, primary producers, decomposers, fixers; but they do it in extreme environments. Eukarya: protista; single celled eukaryotes: plants, animals and fungi; are multicellular eukaryotes. Fungi and animals are more related to eachother than plants. Flagella, pseudoposia, cilia: primary producers, 50% of oxygen, symbiosis, decomposers, parasitic, pathogenic, we evolved from protists. Land plants evolved from green algae: eukaryotic, multicellular; chloroplasts photosynthetic pigments, vacuole for water storage, cell wall with cellulose, photoautotrophs use photon for energy; uses chlorophlast. Adaptations to prevent dessication: cuticle: covers the epidermis and prevents excessive water loss, vascular tissue: ocnducts watch internally. Sexual: self fertilization, pollination, cross fertilization: asexual: cloning. Alternation of generations: haploid stage, diploid stage.
