1. Which is not a characteristic of jawed fishes? a. endotherm
b. gills
c. skin covered by scales
d. two-chambered heart
A

Several billion years ago which gas was the least prevailant in the atmosphere

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

Astudent completed a lab report. which correctly describes the difference between the “question” and “hypothesis” sections of her report? “question” states what she is asking, and “hypothesis” states the result of her experiment. “question” states what she is asking, and “hypothesis” states what she thinks the answer to that question is in “if . . then . . because” format. “question” describes what she is trying to find out, and "hypothesis" states the procedures and methods of data collection. “question” describes what she is trying to find out, and “hypothesis” states any additional information or prior knowledge about the question.