Question

Match the taxonomic terms below with the descriptions that follow. Options may be used once, more than once, or not at all.

A) H. heidelbergensis
B) H. erectus
C) H. ergaster
D) H. habilis
E) H. sapiens

43) Which of these species was the first to show a trend toward reduced sexual dimorphism?

Answer 1

The species H. ergaster was the first to exhibit significantly reduced sexual dimorphism with males being roughly 20% larger than females.

Step-by-step explanation:

The species H. ergaster was the first to show a trend toward reduced sexual dimorphism. In H. ergaster, males were only about 20 percent larger than females. This reduction in size difference between the sexes hints at less male-male competition for mates compared to prior hominins, such as australopithecines, and possibly indicates a shift towards a more monogamous mating system with greater parental investment in offspring.