what makes a plant a plant?
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What makes a Plant a Plant?. Plant Characteristics How are Plants Classified. Plant Characteristics. They make their own food Chloroplasts contain chlorophyll Chlorophyll absorbs energy from the sun Plants use the energy to make food - glucose (sugar) Process is called Photosynthesis. - PowerPoint PPT PresentationTRANSCRIPT
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What makes a Plant a Plant?
Plant CharacteristicsHow are Plants Classified
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Plant Characteristics
• They make their own food–Chloroplasts contain chlorophyll–Chlorophyll absorbs energy from the
sun–Plants use the energy to make food -
glucose (sugar)–Process is called Photosynthesis
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Plant Characteristics
• Plants Have a Cuticle
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What is a Cuticle?
–A waxy layer that coats the surface of stems, leaves, and other plant parts exposed to the air.
–Keeps plants from drying out.
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Plant Characteristics
• Plant Cells have Cell Walls
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What is a Cell Wall
–a plant cell is surrounded by a rigid cell wall
–outside of the cell membrane
–helps support and protect the plant
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Plant Characteristics
• Plants reproduce with spores and sex cells–there are two stages in a plants life:
•sporophyte•gametophyte
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What is a Sporophyte?
• A plant in the spore producing stage of life.
• Spores can grow directly into an adult plant
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What is a Gametophyte?
• The stage in a plant’s life where it produces male and female sex cells.
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More on Gametophytes
• Male and female sex cells must join in order to grow into a new plant. This is called Fertilization.
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How are Plants Classified?
• There are more than 260,000 species of plants.
• They can be divided into two groups:–Nonvascular–Vascular
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How are Plants Classified?
• Nonvascular Plants:–have no pipes to transport water and
nutrients–depend on diffusion and osmosis to
move material from one part of the plant to another
–They have to be small: mosses, liverworts
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How are Plants Classified?
• Vascular Plants–Have tissues that deliver needed
materials throughout a plant - called vascular tissues.
–Can be almost any size.–Are divided into gymnosperms and
angiosperms
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How are Plants Classified?
• Gymnosperms -- non-flowering plants• Angiosperms -- flowering plants