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Fossil Image Bank Questions

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1
With the appearance of Homo ergaster in hominin evolution there was a substantial reduction in sexual dimorphism compared to the earlier Australopithecine species. What could have been the significance of this reduction?
A)Signals entering into new environments
B)Females were becoming the dominant sex
C)Indicates a multimale/multifemale social structure
D)Increased group competition
E)Reduced level of group competition





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