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Bryophyte

plantevolution

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Bio104 Laboratory ? Student?s Guide John Jay College, C.U.N.Y Lab #6 ? Page 1 Lab #6: Evolution of Land Plants I. Introduction a. Last week, we learned about several types of green algae and explored their evolution from solitary single-celled organisms through colonialism and into multicellularity. Although green algae are protists, green algae and land plants share a common ancestor and have many shared features. Both are Eukaryotes and both have chloroplasts that are strikingly similar. b. However, plants have diverged considerably from algae. The two most striking differences are that plants have evolved life cycles that are very distinct from that of protists, and that nearly

Campbell ch 29

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Plant Diversity I: How Plants Colonized Land Chapter 29 Overview: The Greening of Earth For more than the first 3 billion years of Earth?s history, the terrestrial surface was lifeless Cyanobacteria likely existed on land 1.2 billion years ago Around 500 million years ago, small plants, fungi, and animals emerged on land ? 2011 Pearson Education, Inc. Since colonizing land, plants have diversified into roughly 290,000 living species Land plants are defined as having terrestrial ancestors, even though some are now aquatic Land plants do not include photosynthetic protists (algae) Plants supply oxygen and are the ultimate source of most food eaten by land animals ? 2011 Pearson Education, Inc. Figure 29.1 1 ?m Concept 29.1: Land plants evolved from green algae

Biology - Modern Plants

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Modern Plants Bryophytes (mosses) and Relatives Pteridophyta (Ferns) and Relatives Gymnosperms and Relatives Angiosperms and Relatives Examples Mosses, Liverworts, Hornworts Ferns, Psilotum (whisk fern), Lycopodium, Equisetum (horsetails) Conifers, Gingko, cycads Flowering plants, grasses, hardwoods Transport(xylem and phloem) Mostly Nonvascular Vascular Vascular Vascular Life Cycle Gametophyte (N) dominant Sporophyte dominant, small separate Gametophyte Sporophyte dominant Sporophyte dominant Spores or Seeds Spores Spores Seeds Seeds Fertilization Water Water Wind (Pollination) Wind/ animals (Flowers) Dispersal Water/ Wind Spores Water/ Wind Spores Wind Seeds Wind/ animals (Fruits) Seeds
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