Chapter 30 GREEN PLANTS

Chapter 30 GREEN PLANTS - PIONEERS - THE FIRST TERRESTRIAL...

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Unformatted text preview: PIONEERS - THE FIRST TERRESTRIAL ORGANISMS. Chapter 30 GREEN PLANTS Summary Why are plants important? Evolution 4 major groups Life cycle – general Key lineages Why are Plants Important? 3 categories: Ecosystem services Fuels and fibers Other Assignment: Read “Why do Biologists Study the Green Plants?” pp 627-630 and write a summary on the benefits of plants. Due next class period. Evolution It started with green algae, confined to a watery environment, ~ 570 mya. Land plants 1 st appeared about 450 mya, preceding land animals. Evolution Invasion of land presented some of the same problems for plants as it did for animals: Prevention of desiccation  Soln: development of a cuticle and pores, then stomata . Need for systems to conduct food and water throughout plant  Soln: development of vascular systems . Protection of the embryo  Soln: development of seeds . 4 Major Groups Based on similar characteristics and order of evolution, fig 30.9.  Non-vascular land plants , mosses, liverworts and hornworts  Vascular plants  Seedless vascular plants , club mosses, ferns and horsetails  Gymnosperms have “naked” seeds that protect embryo, conifers, cycads and ginkgos.  Angiosperms have enclosed seeds (fruits) and flowers. Figure 30-9 Green plants Land plants Vascular plants Seed plants Gymnosperms Angiosperms Flowers Seeds Vascular tissue Ability to live on land Chloroplasts containing chlorophyll a + b and β-carotene Green algae Nonvascular plants Seedless vascular plants Eukarya A r c h a e a B a c t e r i a ( r e d a l g a e ) ( u l v o p h y t e s ) ( c o l e o c h a e t e s ) ( s t o n e w o r t s ) R h o d o p h y t a U l v o p h y c e a e C o l e o c h a e t o p h y c e a e C h a r a p h y c e a e H e p a t i c o p h y t a A n t h o c e r o p h y t a B r y o p h y t a ( l i v e r w o r t s ) ( h o r n w o r t s ) ( m o s s e s ) ( l y c o p h y t e s ) ( w h i s k f e r n s ) ( h o r s e t a i l s ) ( f e r n s ) L y c o p h y t a P s i l o t o p h y t a S p h e n o p h y t a P t e r i d o p h y t a C y c a d o p h y t a G i n k g o p h y t a O t h e r c o n i f e r s...
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This note was uploaded on 09/08/2011 for the course BIOL 1403 taught by Professor Dini during the Fall '09 term at Texas Tech.

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Chapter 30 GREEN PLANTS - PIONEERS - THE FIRST TERRESTRIAL...

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