New answers tagged

4

Let's be clear most mammals, including basal primates, had only 2 cone cell types. Primates evolved a new cone cell becasue frugivores have a distinct advantage being able to distinguish reds and yellows. The mammal lineage may have never had a fourth cone cell, if they did it was lost early. Eutherian mammals lost the third cones cells likely because we ...


Top 50 recent answers are included