Question

Homo erectus represents a different grade of evolution. what does "grade" mean? having similar adaptive patterns a step towards becoming civilized indicates ancestry to other hominids a bigger and stronger hominid all of the above

Answer 1

Grade means HAVING SIMILAR ADAPTIVE PATTERNS.
In evolution, a grade refers to a group of species that have similar traits (the trait could be morphological or physiological) and which has given rise to another group that possess major differences from the ancestral form.