Which Statement Regarding Myoglobin in Antarctic Fish Is True

question 47

Multiple Choice

Which statement regarding myoglobin in Antarctic fish is true?

• A) All icefish have nonfunctional myoglobin.
• B) Mutations that eliminated myoglobin function occurred independently in four lines of icefish.
• C) Mutations that eliminated myoglobin function occurred once in early icefish evolution and have affected six species in different lineages.
• D) Identical mutations that eliminated myoglobin function occurred in four separate lineages of icefish.

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