Submitted by admin on Tue, 05/05/2015 - 18:21
definition:
An early type of animal or plant from which others have evolved:A person, typically one more remote than a grandparent, from whom one is descended:
sentence:
The ancestor of all placental mammals including almost all species of mammals living today was a tiny, furry-tailed creature that evolved shortly after the dinosaurs disappeared
difficulty:
medium
toefl frequency:
2
toefl classification: