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• b. They are arranged in increasing energy with red as the least and violet as the greatest

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All living organisms require energy for their metabolic (chemical) processes. The ultimate source of this energy is the sun. Photosynthetic organisms, including plants, protists (single-celled organisms), and blue-green algae (cyanobacteria), convert light energy into the chemical energy of sugars, which can be used to power metabolism. During photosynthesis, molecules referred to as pigments (due to the wavelength, thus color, they reflect) are used to capture light energy. Four primary pigments of green plants can easily be separated and identified using a technique called paper chromatography. These pigments include two greenish pigments called chlorophylls and two yellowish pigments called carotenoids. Pigments are separated according to differences in their relative solubilities.

The abundances of the noble gases decrease as their atomic numbers increase. ... yellow, red, red or blue, yellow-green, blue to green,