Which of These Possibilities Might Explain the Lack of Mitochondria

question 4

Multiple Choice

Which of these possibilities might explain the lack of mitochondria in Giardia? (Select all that apply)

• A)environmental changes that increased atmospheric oxygen
• B)environmental changes which decreased atmospheric oxygen
• C)an opportunity to colonize a novel anaerobic niche found within multicellular organisms
• D)evolution of photosynthetic capability
• E)evolution of anaerobic respiration capability by Giardia

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