Reading Comprehension
试题详情
题目：
It can be inferred that on the basis of the 1981 discovery of conodont remains, paleontologists could draw which of the following conclusions?
选项:
A、The earliest vertebrates were sedentary suspension feeders.
B、Ostracoderms were not the earliest vertebrates.
C、Defensive armor preceded jaws among vertebrates.
D、Paired eyes and adaptations for activity are definitive characteristics of vertebrates.
E、Conodonts were unlikely to have been predators.
答案:
B
