3. until the early there were only negligible amounts of free oxygen in the atmosphere. a. mesozoic b. cenozoic c. precambian d. proterozoic

Select all the correct answers. which statements fail to meet the requirements of a scientific claim? 1 even though evidence indicates that the solar system's planets follow elliptical paths, copernicus's model involving circular orbits is true. 2 the evidence supporting newton's laws of motion was accurate in newton's time, but the universe operates differently today. 3 flowers that reflect the most ultraviolet light are more likely to attract bees and other pollinators than flowers that reflect less ultraviolet light. 4 in the final 100 meters of a 10,000-meter race, an athlete's speed is more strongly related to anaerobic efficiency than to aerobic efficiency.

What field of science did harry hess study?

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water