Which Statement About the Globin Genes Is True

Multiple Choice

Which statement about the globin genes is true?

A) They are all continually expressed in humans.
B) The globin genes first arose in invertebrates.
C) Different tissues in mammals will express different globin genes.
D) All the different globin genes carry out the exact same function in humans.
E) All forms of human globins bind oxygen with the same affinity.