Question

Which of the following ancestral human species had an average cranial capacity of around 900 cm³?

a) Homo habilis
b) Australopithecus afarensis
c) Homo erectus
d) Homo neanderthalensis

Answer 1

The ancestral human species with an average cranial capacity of around 900 cm³ is Homo erectus.

Step-by-step explanation:

Answer to Student's Question

The ancestral human species with an average cranial capacity of around 900 cm³ is Homo erectus (c).

Homo Habibis, an earlier species, had a smaller brain size of about 800 cubic centimeters. Australopithecus afarensis had an even smaller brain size, more similar to that of a chimpanzee. Meanwhile, Homo neanderthalensis, actually had a larger average cranial capacity than even modern humans, ranging about 1,200 to 1,400 cubic centimeters, with some individuals reaching up to 1,520 cubic centimeters. Homo erectus is known for having cranial capacities ranging between 1,000 and 1,200 cubic centimeters, which suggest that the species that fits the description provided in the question is Homo erectus.