Q: What is the earliest reptile? Choices: - sporozoans - pliosaur - staurikosaurus - hylonomus A:
hylonomus

Q: What are made in the first step of the scientific method? Choices: - patterns - hypothesis - conclusions - observations A:
observations

Q: What distinguishing feature predates the branching of mammals from other vertebrates? Choices: - adaptation - eggs - teeth - backbone A:
backbone