10. Cell Signaling
Introduction to Cell Signaling
Multiple Choice
Multiple ChoiceEvidence that cell signaling evolved early in the history of life comes from __________.
A
comparative studies of mitochondrial DNA
B
comparative studies of ribosomal RNA
C
the fossil record
D
the study of protein receptors embedded in the nuclear membrane
E
the similarity of cell-signaling mechanisms in organisms that have a very distant common ancestor
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