Agene family that codes for various hormone receptors has been accumulating nucleotide ubstitutions at a rate of 0.4 per million years. on average, there have been 60 substitutions between the common ancestor of this gene family and each of the various living forms of this gene. based on these figures, this hormone receptor gene family likely originatedmillion years ago. a. 15 b. 24 c. 75 d. 150 e. 300

The answer is letter D

Explanation:

Based on these figures, this hormone receptor gene family likely originated 150 million years ago.

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."