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Which wavelength(s) are most effectively absorbed by leaf pigments? Which wavelength(s) are poorly absorbed?
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- We know that short-day plants do not really need short days, but actually long nights. Describe the type of treatment that proves this. Is some kind of light given during the night or some period of darkness given during the day?Describe the location and function of the photoreceptorcells.What is the key role of light energy in the initial step of thephotosynthetic light reactions?
- List what is included in the Light-Gathering Pigments. Flowers differ in how much sunlight they absorb. Whymight this matter to a hummingbird seeking nectar on acool morning?The green color of plants is explained by the wavelengths of light that are reflected, transmitted, and absorbed by the chlorophylls in the thylakoids. Which of the following statements is true? Plants appear green because chlorophylls reflect and transmit yellow and green wavelengths of light, and absorb red and violet-blue wavelengths of light. Plants appear green because chlorophylls reflect and transmit red and blue wavelengths of light, and absorb yellow and green wavelengths of light. Plants appear green because chlorophylls reflect and transmit red and blue wavelengths of light, and absorb white wavelength of light. Plants appear green because chlorophylls reflect and transmit white wavelength of light, and absorb red and violet-blue wavelengths of light.
- Why is it advantageous for a plant toxin to elicit a bitter tastewhen an animal eats the plant rather than a bland or sweettaste?What effect does room temperature affect the stomata? Does it open or close?Explain the mechanism of why leaves are green during the spring and summer but turn beautiful colors each fall. Include light absorption and reflections well as specific plant pigments involved.