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chapter 29 30 31 - 1 Fungi Fungi Plant Plant Diversity...

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Unformatted text preview: 2/13/2008 1 Fungi Fungi Plant Plant Diversity Diversity Animalia Plantae Symbiosis of chloroplast ancestor with ancestor of green plants Symbiosis of mitochondrial ancestor 3 4 The Tree of Life mitochondrial ancestor with eukaryotes Possible fusion of bacteria and archaea yielded eukaryotes Common ancestor of all organisms 1 2 Leicontre & Le Guyader, 2006 Tree of Life Plants evolved from green algae called charophyceans Origin of seed plants (about 360 mya) Land plants Vascular plants Seed plants Seedless plants Bryophytes Liverworts Hornworts Mosses Lycophytes Pterophytes Gymno-s perms Angio- sperms Charophyceans Non-vascular plants Ancestral green alga Origin of land plants (about 475 mya) Origin of vascular plants (about 420 mya) 2/13/2008 2 Leicontre & Le Guyader, 2006 Tree of Life gametophyte (n) Æ gametes Æ eggs / sperm haploid and diploid generations Alternation of generations in plants’ life cycles eggs + sperm Æ zygote (2n) zygote Æ sporophyte (2n) sporophyte (2n) Æ spores (n) spores Æ gametophytes Mitosis Alternation of Generations Spores Mitosis Gametes: eggs / sperm Haploid multicellular organism (gametophyte) Mitosis Zygote Diploid multicellular organism (sporophyte) MEIOSIS FERTILIZATION plants with flowers MESOZOIC CENOZOIC rophyceans ( green algae ) Bryophytes Seedless vascular Gymnosperms Angiosperms n 2n n 2n n 2n Life cycles as phylogenetic traits PALEOZOIC Ch a plants with seeds vascular system land plants no vascular system no vascular system 2n 2n 2n n 2n n 2n Much variability in alternation of generations AG....
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This note was uploaded on 04/16/2008 for the course BIO 131 taught by Professor Paz y mino during the Fall '08 term at UMass Dartmouth.

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chapter 29 30 31 - 1 Fungi Fungi Plant Plant Diversity...

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