Lab Quiz
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What simple things do plants require?
Sunlight, Water, CO2, Minerals
With the approach of fall/winter what changes
• Sunlight decreases (24hr Sunlight) - Water availability decreases (liquid to solid)
Deciduous
Drops leaves (Oak,Sugar Maple)
Coniferous
Holds leaves (Spruce)
Botanical armor
Bark: Protects, keeps things out
Cork and suberin
Makes up bark, insulatory (keeps from losing heat/moisture)
Suberin
like wax
Squirrels do what
• nibble and chew off twigs from Oak to thicken nest and trap air to insulate it • lap up sugar from maple
Leaf pigment (chlorophyll)
-greens, drives photosynthesis, driven by sunlight
Leaf pigment (xanthophylls)
-yellows, green pigment leaves from lack of sunlight
Leaf pigment (carotenoids)
-oranges
Leaf pigment (anthocyanins)
-reds, can be color of stress, less water, lots of sugar
When comparing to Animals how does it seem plants behave?
-ectotherms and poikilotherms
Systems of plants
• 2 systems - Shoot (up) , Root (down)
Plant organs
• 3 organs - leaves, stems, roots
abscission
leaf drop