Plant structure adaptations and responses
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1. Fibrous Roots:branching roots hold soil in place to prevent soil erosion
2. Tap Roots –larger central root reaches deep water sources underground
Ex. Trees, Carrots, & Dandelions
Looking at the picture to the left:
What years had the most rain?
What years experienced the worst drought?
Each light and dark tree ring equals one year of annual growth. Light rings for fast spring growth, dark for slow summer growth.
Smaller rings tell of past droughts that have occurred.
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Elephant Ear Plant
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b/c they contain Chloroplasts.
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What goes out?
What goes in?
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A average size maple tree can transpire 200 liters of water per hour during the summer.
Transpiration is the #1 driving force for pulling water up stems from roots.
SepalStructure of a Flower
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1.Pistil:female reproductive structure
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Cells in one blooming flower signals other blooms using hormones to open.
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Ethylene released by apples and tomatoes causes fruit to age quickly.
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1. Tropism: the way a plant grows in response to stimuli in the environment.
-Plants bend towards light
-plant roots grow down with gravity, shoots (stems) grow up against gravity and out of the soil.
-vines grow up around trees, venus flytrap closeswhen leaves are touched
What type of tropism is shown in these pictures?
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