Which of the Following Explains Why Photosynthesis Is Widely but Discontinuously

question 118

Multiple Choice

Which of the following explains why photosynthesis is widely but discontinuously distributed throughout the eukaryotic tree?

• A)Photosynthesis was acquired early in evolution, but then lost.
• B)Photosynthesis was acquired multiple times through endosymbiosis.
• C)All eukaryotes are capable of photosynthesis, but it is repressed in some cases.
• D)Some eukaryotes evolved photosynthetic pathways separate from chloroplasts.

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Definitions:

Glyceraldehyde-3-phosphate

A three-carbon molecule that plays a central role in glycolysis and photosynthesis, involved in the biochemical pathways of energy production.

RuBP Molecules

Ribulose bisphosphate molecules that are involved in the carbon fixation phase of photosynthesis.

Fluorescence

The emission of light of a longer wavelength (lower energy) than the light originally absorbed.

Ground State

The lowest energy state of an atom