Plants

What is a plant? Multicellular Multicellular Eukaryotes Eukaryotes Cell walls made of cellulose Cell walls made of cellulose Have chlorophyll to carry out photosynthesis Have chlorophyll to carry out photosynthesis Chlorophyll is contained Chlorophyll is contained in chloroplasts in chloroplasts

Evolution of Plants Plants evolved from multicellular green algae Plants evolved from multicellular green algae First plants appeared 450 million years ago First plants appeared 450 million years ago

Bryophytes Nonvascular (no transport system) Nonvascular (no transport system) Depend on water for reproduction Depend on water for reproduction only grow a few centimeters tall only grow a few centimeters tall Example: moss Example: moss

Seedless Vascular Plants Have a vascular system Have a vascular system Xylem = carry water Xylem = carry water Phloem = carry nutrients Phloem = carry nutrients Still need water to reproduce Still need water to reproduce Example: ferns Example: ferns

Seed Plants Seeds allow plants to reproduce without water! Seeds allow plants to reproduce without water! Seeds can withstand periods of no water, no food, extreme temperatures Seeds can withstand periods of no water, no food, extreme temperatures Seeds spread plants Seeds spread plants

Gymnosperms Plants with seeds on cones Plants with seeds on cones Example: conifers (big trees) Example: conifers (big trees)

Angiosperms Flowering plants Flowering plants Flowers & fruit attract animals and aid in dispersal Flowers & fruit attract animals and aid in dispersal

Monocots and Dicots