multicellular eukaryotic sexually reproducing autotrophic photosynthetic cell walls made of...
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multicellular eukaryotic sexually reproducing autotrophic photosynthetic cell walls made of cellulose store food as starch
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Plants take CO2, H2O, and sunlight and create O2 and food (glucose).
They convert the energy from the sunlightinto a form of energy they can use.
CO2
O2
Sunlight
H2O
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Evolved from multicellular green algae that lived 430 million years ago
Both Photosynthesize with chlorophyllBoth have cell walls with celluloseBoth store food as starch
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•Uni- and multicellular plant-like protists•Evolved in the sea•No true roots, leaves, or stems or complex
reproductive structures•Gametes are released into water, where
fertilization occurs•Use the same kind of chlorophyll found in
land plants
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Needed:to reproduce on landto conserve waterto absorb minerals from rocky surfaces
Adaptations:seeds(eventually- first land plants did not have them)cuticle, waxy coatingfungal symbiosis with alga
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Reproduction in Plants
Most plants have 2 stages in their life cycle:
Sporophyte: produce spores which grow into gametophytes.
Gametophyte: produces sperm and egg cells. When egg cells are fertilized they grow into sporophytes
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•Must rely on Osmosis and Diffusion to transfer materials
•No special system to transport water & minerals throughout the plant
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Must have moist environment to reproduce
The result is that these plants remain small & close to the ground
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Flat, broad tissue for photosynthesis; no true
leaves
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Rhizoids, long thin strands of cells, attach the plant to the soil.
Photo taken from: http://www.csupomona.edu/~jcclark/classes/bot125/resource/graphics/psi_rhizoid.html; Photographer:Curtis Clark. Plan t Morphology Course WebPageDownloaded 4/1/2003.
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Live in almost every environmentDecompose dead organismsKeep the soil moist and prevent erosion
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Decomposer of dead organismsForms peat bogsVery absorbentUsed in gardeningUsed for fuelPart of coal making process
http://home.clara.net/adhale/bryos/spulch.htm“Mosses and Liverworts in Wales”Downloaded 4/1/2003Alan Hale
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http://home.clara.net/adhale/bryos/spulch.htm“Mosses and Liverworts in Wales”Downloaded 4/1/2003Alan Hale
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Adapted only to moist areasNot as abundant as mossesVery unusual characteristics
http://www.biology.iastate.edu/Courses/201L/Bryoph/%20BryoINDX1•Photos by Maria Oehler, Allison Hall, Linda Westgate and Botanical Society of America Lab Topic 15 Investigating Plant Phylogeny: Seedless Plants Nonvascular Seedless PlantsDownloaded 4/1/2003