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6
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orange pigments that exist in some plants
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7
|
trees that drop all their leaves at the same time once a year
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8
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the protective outer covering of a tree
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9
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red pigments that are produced by leaves of some trees in the fall
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10
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a green pigment that plants need to rap the sunlight they use for photosynthesis
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11
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a seed with a papery covering that can be carried by the wind
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1
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a family of trees that bear cones, not flowers; they usually have evergreen needle-shaped leaves
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2
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a hard, woody part of a cone that protects a developing seed
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3
|
trees that keep most of their leaves all year
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4
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a chemical that shows as a color
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5
|
the process by which plants use sunlight trapped by chlorophyll to change carbon dioxide and water into sugars and oxygen
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