Organelle genomes Organelle gene expression processes Organelle-to-nucleus signaling
Plants. Plant Cells Cell walls provide protection and structure Conduct photosynthesis – Use...
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Transcript of Plants. Plant Cells Cell walls provide protection and structure Conduct photosynthesis – Use...
Plants
Plant Cells
• Cell walls provide protection and structure• Conduct photosynthesis– Use chlorophyll in organelle chloroplast to do it
Structures
• Cuticle waxy, protective layer secreted onto surface of plant which holds water
• Cellulose chemical compound that provides structure and support
Classificiation
• Vascular plants use tubelike structures that carry water and nutrients throughout plant
• Nonvascular plants lack tubelike structures so must use other ways to transport water and nutrients
Nonvascular Plants
• Very small plants that have rhizoids rather than roots
• Reproduce by spores not seeds• Examples– Mosses green, leaflike growths around stalk– Liverworts flattened, leaflike bodies– Hornworts one chloroplast in each cell
Moss
Liverwort
Hornwort
Plant Life Cycle
• Two stages– Gametophyte stage begins when sex cells
produce haploid cells called spores– Sporophyte stage begins with fertilization