The characteristic golden-brown pigmentation of diatoms stems from the presence of__________?
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Answer: C. Fucoxanthin, diatoxanthin, diadinoxanthin
Explanation
Diatoms owe their characteristic golden-brown color to accessory photosynthetic pigments like fucoxanthin. Diatoxanthin and diadinoxanthin work alongside fucoxanthin to capture light energy efficiently. These accessory pigments mask the green chlorophyll pigments present within the diatom chloroplasts. Photosynthetic pigments absorb specific wavelengths of light to power the conversion of solar energy. Accessory pigments expand the spectrum of light wavelengths available for aquatic photosynthesis. Diatoms possess unique cell walls made of silica known as frustules.
Diatoms contribute significantly to global oxygen production and marine carbon sequestration. Marine biologists analyze diatom pigment composition to study phytoplankton bloom dynamics. Fossilized diatomaceous earth has numerous industrial applications ranging from filtration to abrasives. Mycoxanthin and myxoxanthophylls are pigments typically found in cyanobacteria rather than diatoms. Alpha and beta carotenes are widespread plant pigments lacking the specific diatom profile. Stating none of the above is incorrect because the third option lists the exact pigments.
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