Multiple Choice
The pigment that provides brown or black color to hair is _____.
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9. Photosynthesis
Pigments of Photosynthesis
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The leaf pigments mostly responsible for gold to orange leaf colors in the fall are:
A
Phycobilins
B
Carotenoids
C
Anthocyanins
D
Chlorophyll a
Verified step by step guidance1
Understand the role of pigments in leaves: Pigments are molecules that absorb specific wavelengths of light and give leaves their color. During the fall, the breakdown of chlorophyll reveals other pigments that contribute to the leaf's color.
Learn about carotenoids: Carotenoids are pigments that absorb light in the blue-green and violet regions and reflect yellow, orange, and red light. They are responsible for the gold to orange colors in leaves during the fall.
Compare carotenoids with other pigments: Phycobilins are pigments found in algae, not typically in leaves. Anthocyanins are responsible for red to purple colors, and chlorophyll a is the primary pigment for photosynthesis, giving leaves their green color.
Recognize the seasonal changes: In the fall, chlorophyll breaks down due to reduced sunlight and cooler temperatures, allowing carotenoids and anthocyanins to become more visible.
Conclude that carotenoids are the pigments responsible for gold to orange leaf colors in the fall, as they reflect these wavelengths of light.
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