Cytochrome C structure Cytochrome C is a protein found in all species, and functions in energy metabolism. The more closely related two different species are, A. ances the greater the number of accumulated mutations will have occurred in their cytochrome C molecules.
B. the greater the differences in oxygen utilization in energy metabolism the more like their cytochrome Camino acid sequences are.
C. the greater the number of differences there are in their amino acid sequences in cytochrome C.

Cytochrome C is a protein found in all species, and functions in energy metabolism. The more closely related two different species are,

C. the greater the number of differences there are in their amino acid sequences in cytochrome C.

Explanation:

Cytochrome c, unlike other cytochromes, is highly water-soluble.  It is an essential component of the electron transport chain, where it transfers electrons between complex III and complex IV of the respiratory chain.  It undergoes oxidation and reduction when its iron atom converts between the ferrous forms to the ferric forms, but it does not bind to oxygen.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

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