Biology SI Session Ch 28 1 Opisthokonts a Animas b Choanoflagellates 2 Amoebozoans a Pseudophobia fake feet 3 Archeaeplastids a Red algae b Green algae evolve into land plants 4 Stramenopiles a Brown algae 5 Alveolates 6 Rhizarians 7 Excavates Simple Multicellularity Cell show no little differentiation Cells in contact with external environment o Due to diffusion Complex Multicellularity Larger organism Specialization of cells Communication between cells Internal and external cells Reproduce Adhesion o Plants Pectin o Animals Cadherins and integrins Communication o Plants Plasmodesma o Animals gap junctions Way to move large objects across long distances Bulk Transport Diffusion High to low concentration Complex Multicellularity Stick together Communicate Genetic program o Regulate cell division and differentiation o Plants meristem o Animals through blastulation gastrulation 1 Stick Together cell adhesion 2 Communication 3 Bulk transport O2 required to get bigger Biology SI Session Ch 29 Evolution Oxygen Phylogeny Xylem Green algae classes relative to land plants Vascular Plants have xylem and phloem o Gymnosperms o Angiosperms flowering plants Tracheids single celled Vessels multicellular Water travels Water enters exists through pits Happens through capillary action transpiration Lignins give support Risks o Collapse o Cavitation Air bubbles Phloem Moves nutrients Move from source to sink Sieve tubes o Source storage of carbohydrates o Sink places that need carbohydrates Happens due to turgor pressure Risks o High Pressure leaks Roots Symbiosis Water Stability Main function increase surface area 2 organisms benefiting from each o Mycorriziae fungi Fungi provides extra surface area for phosphate Plant gives fungi carbohydrates and protection o Rhiziodia bacteria Bacteria gives plant nitrogen Plant provides protection
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