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
Correct Answer:

Verified
Correct Answer:
Verified
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