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Updated: Jan 21, 2026

In Vitro Method to Study Sex-Based Differences in Conjunctival Goblet Cells
Published on: July 28, 2023
Functional sex differences and signal forms have coevolved with conflict
D Vaughn Becker1, Shelli L Dubbs2
1Human Systems Engineering Program, Arizona State University, Mesa, AZ 85212. vaughn.becker@asu.eduwww.public.asu.edu/~loids/.
Abstract:
Evolutionary theory makes further predictions about conflict. It predicts sex differences in the proclivity to attack and defend. It further suggests complementary biases in what we expect of the sexes. Finally, it suggests that the forms of human facial expressions of anger and happiness may have coevolved with the regularity of conflict as a means of signaling, bluffing, and defusing attack.
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