BIO 200 Lecture Notes - Lecture 14: Green Algae, Brown Algae, Red Algae
Document Summary
Lecture 14: origin of land plants and non-seeded. Endosymbiosis, chloroplasts, and chlorophyll: primary endosymbiosis: single engulfment, eukaryotic cell engulfed cyanobacteria, red algae: chlorophyll a, green algae: chlorophyll a and b, secondary endosymbiosis: additional engulfment, eukaryotic cell engulfed red algae, brown algae: chlorophyll a and c. Land plants have chlorophyll a and c as well. Stoneworts: sister taxa to land plants, many homologous traits, filamentous (not flattened, branching growth from tips, example: chara sp, grows in green mats , lives in freshwater sources. Land plants: bryophytes: non-vascular plants, no tracheid cells. Cannot transport water or nutrients over long distances. Entire plant has access to food and water through diffusion: embryophytic: embryo maintained within maternal tissue, gametophyte dominant (haploid for most of their lives, sporophyte grows from gametophyte, needs water for sexual reproduction. Lives in moist areas: liverworts, hornworts, mosses, tracheophytes: seedless vascular plants, tracheal cells provide a system of transport between the tops and bottoms of plants.