BIO SCI 94 Lecture 14: Green Algae and Land Protists Part 1

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 94
• Professor: Brad Hughes

Document Summary

Green algae-important photosynthetic organism in freshwater habitats. Green algae considered protists, why we study them with land plants: Aquatic terrestrial life happened when green algae evolved into land plants. Land plants-first organisms to live exposed completely to air. Before land plants, terrestrial life-bacteria, archaea, single celled protist. Plants are interesting, humans can"t live without plants. Plants needed for food, oxygen, fuel, building material, clothing, rope, paper, basket fibers. Agriculture, forestry, horticulture supported by biological science. Help life supporting traits of physical components of ecosystem. Green plants change environment helps other organisms. Hold soil, prevent nutrients from being lost from erosion. Provide shade, reduce wind impact moderate climate. Reduce co2 in atmosphere to make sugars. Plants provide most of food supply, fuel, fiber building materials, medicines. Domestication of crop start of agricultural research. Artificial selection for plants with certain properties change in plant characteristic. Artificial selection on wild species crop plants. Fossil fuels- coal, petroleum, natural gas; replaced wood.