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Unformatted text preview: 1 Plant Diversity I Plant Diversity I Seedless non Seedless non-vascular plants vascular plants We will focus on this taxon for rest of semester Plant Kingdom Plant Kingdom 4 major living groups 4 major living groups Non-Vascular plants 1 Bryophytes Vascular plants 2- Ferns and fern allies 3- Gymnosperms 4- Angiosperms But first But first where did land plants where did land plants come from? come from? Plants = (trees, corn, beans, etc.) Plants = (trees, corn, beans, etc.) 440 million years ago (Ordovician), no 440 million years ago (Ordovician), no plants on land, only in water plants on land, only in water Next 30 million years (Silurian), plants Next 30 million years (Silurian), plants colonized land colonized land Where did their ancestors come from? Where did their ancestors come from? All land plants All land plants probably probably evolved from an ancient green evolved from an ancient green alga alga Evidence? Evidence? Modern Modern green algae green algae share many common share many common characteristics with modern characteristics with modern land plants land plants Photosynthesis Photosynthesis Pigments Pigments Cell walls Cell walls Cell division, etc....
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- Spring '08
- Plants, Bryophytes, land plants, Marchantiophyta, Bryophytes 3- Hornworts