How Do Anoxygenic Phototrophs Benefit from Having Accessory Pigments That

question 16

Multiple Choice

How do anoxygenic phototrophs benefit from having accessory pigments that allow light to be harvested at deeper areas of a moist or aquatic environment?

• A) Accessory pigments allows even anaerobic microbes to carry out photosynthesis, as they can harvest light energy in the deeper areas where oxygen won't be present.
• B) The cells can use wavelengths of light that have not been absorbed by the photosynthetic organisms closer to the surface of the water.
• C) These organisms don't have to compete with other cells that use oxygen in the upper levels for the scarce nutrients in the aquatic environment.
• D) This allows even anaerobic microbes to conduct photosynthesis, as they can harvest light energy in the deeper areas where oxygen won't be present AND can use wavelengths of light not absorbed by the photosynthetic organisms closer to the surface of the fluid.
• E) This allows even anaerobic microbes to conduct photosynthesis, as they can harvest light energy in the deeper areas where oxygen won't be present, use wavelengths of light not absorbed by the photosynthetic organisms closer to the surface of the water; AND don't have to compete with other cells that use oxygen in the upper levels for the scarce nutrients in the fluid environment.

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