What makes a Plant a Plant?

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What makes a Plant a Plant?

• Plant Characteristics
• How are Plants Classified

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What do plants need to grow?

• Air
• Water not too much!!
• Light
• Soil

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Germination
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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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Photosynthesis
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Chloroplasts
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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 Parts
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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 plants 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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Plant
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Pollination
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Plant Life Cycle
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Growing New Plants
Seeds can be planted to grow new plants.
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Growing New Plants

• You can also plant
• Bulbs
• Cuttings
• Runners

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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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Liverwort
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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

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What are the parts of a plant?

• Flower
• This part makes seeds.
• Stem
• This part carries food and water through the
  plant.
• Leaf
• This part makes food for the plant.
• Root
• This part carries water from the soil to the
  plant.

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Parts of a Flower
petal
stigma
anther
style
filament
ovary
ovule
sepal
receptacle
nectary
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Plants are used in many ways.

• Lumber comes from trees.
• Paper comes from trees.
• Gum comes from tree sap.
• Medicines come from many plants
• Cloth comes from cotton plants.

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Poisonous Plants in NC
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