(Hokkaido University) In a group of bark lice, a penis has evolved twice -- in the females. In their nutrient-scarce environment, 'seminal gifts' are an incentive for females to force mating, leading to the co-evolution of female penises and male vaginas.
from EurekAlert! - Social and Behavioral Science http://bit.ly/2EEWmIR
No comments:
Post a Comment