such as "Introduction", "Conclusion"..etc
The adaptive significance of the unique ability in many primates to
distinguish red hues from green ones (i.e., trichromatic color vision)
has always enticed debate among evolutionary biologists. The
conventional theory is that primates evolved trichromatic color vision
to assist them in foraging, specifically by allowing them to detect
red/orange food items from green leaf backgrounds. However, the results
from several empirical studies have called into question the extent to
which trichromacy functions in foraging and if it provides a
performance advantage over dichromatic primates (who lack red-green
color vision). Other studies have suggested that trichromacy evolved in
primates so that they could use physical traits like red skin in
socio-sexual communication, such as a male providing information to a
female about his mate quality.
Now, researchers at Ohio
University (André Fernandez, a PhD student and his mentor, Dr. Molly R.
Morris) have found that trichromatic color vision was present before it
functioned in communication, suggesting that the ability to
discriminate red from green was a pre-existing sensory bias that then
drove the evolution of red-orange pelage and skin, possibly through
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