In What Way Is the Loss of Functional Hemoglobin in Icefish

question 6

Multiple Choice

In what way is the loss of functional hemoglobin in icefish a disadvantage?

• A) An increase in fitness was shown following the appearance of nonfunctional hemoglobin.
• B) The appearance of nonfunctional hemoglobin was accompanied by a decrease in fitness.
• C) Icefish have enlarged hearts and faster blood circulation compared to red-blooded fish.
• D) Icefish have a very small body size to compensate for the loss of functional hemoglobin.

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