What piece of evidence supports the viral model presented in Viewpoint.

Analyze the forces acting on a cyclist who is slowing down as he or she climbs a hill

What is 7/81 as a percentage? round your answer to the nearest tenth of a percent.

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.