BIOLOGY 152 : Biology 152 Notes
Document Summary
A lot of the dna, how it"s encoded, and how it"s packed are very similar between plant and animal cell nuclei. They have many of the same organelles and must perform cell respiration (requires mitochondrion) Better access to sunlight-light not filtered by water. Few herbivores and pathogens (at least at first) Extreme changes in environmental conditions-increase in light intensity (uv light)/ changes in temp. Progenitor-common ancestor of all plant life (land plant) Most abundant, most studied, most important for us. Cell tissue organs : meristematic-responsible for growth, vascular-transport (xylem/phloem, dermal, ground. Determinate growth-finite size and shape to the growth (leaves/flowers) Plasticity-ability to change in response to an environmental condition (not random) Animals-body forms in a large part are pre-determined by genes/relatively little variation in the final product. Apical meristems-area of cells located at the tips of plants that are constantly dividing. The shoot apical meristem (sam) and the root apical meristem (ram) are where primary growth takes place.
