BIOL 1002 Chapter : Chapter 21 Plant Diversity
Document Summary
And for us humans : housing materials, fuel, medicines (quinine, taxol, aspirin, morphine, food and fiber, air filters, pleasure! The ancestors of plants (like other organisms) originated in the water. Benefits: nutrient rich solution, support, no drying out, fertilization by flagellated sperm. Ancestors were similar to modern green algae (below). Both plants and green algae: same type of chlorophyll, store food as starch, cellulose cell walls. The features of plants: chlorophyll, but not all ps, rafflesia arnoldii- the corpse flower. The features of plants: chlorophyll, but not all ps, multicellular, dependent embryos**, alternating forms in the life cycle, heterotrophic alternation of generations, between gametophyte and sporophyte generations. Heteromorphic means different forms", so the sporophyte and the gametophyte have a different overall appearance. Draw the life cycle of plants and answer these questions: In addition to these characteristics, the plant kingdom shows a range of traits that appeared as plants made the transition from their origins in water onto the land.
