Seedless Vascular Plants Fall 2011

Seedless Vascular Plants Fall 2011 - Seedless Vascular...

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Unformatted text preview: Seedless Vascular Plants (Lycophytes, Pterophytes) Table 25-1 Fig. 29-12 Sporophytes of Aglaophyton major Note branched sporophyte; allowed multiple sporangia Reconstruction from fossils from 420 mya Fig. 29-13-3 Key Haploid ( n ) Diploid (2 n ) MEIOSIS Spore dispersal Sporangium Sporangium Mature sporophyte (2 n ) Sorus Fiddlehead Spore ( n ) Young gametophyte Mature gametophyte ( n ) Archegonium Egg Antheridium Sperm FERTILIZATION New sporophyte Gametophyte Zygote (2 n ) Derived Traits: 1. Dominant Sporophyte 2. Vascular Tissue (xylem and phloem) Lignified cells of xylem Fig. 29-13-3 Key Haploid ( n ) Diploid (2 n ) MEIOSIS Spore dispersal Sporangium Sporangium Mature sporophyte (2 n ) Sorus Fiddlehead Spore ( n ) Young gametophyte Mature gametophyte ( n ) Archegonium Egg Antheridium Sperm FERTILIZATION New sporophyte Gametophyte Zygote (2 n ) 3. Well-developed roots Fig. 29-14 Vascular tissue Sporangia Microphyll (a) Microphylls (b) Megaphylls Overtopping growth Megaphyll Other stems...
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This note was uploaded on 02/04/2012 for the course BIO 1225 taught by Professor Caddell during the Fall '11 term at University of Central Oklahoma.

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Seedless Vascular Plants Fall 2011 - Seedless Vascular...

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