What is an example of a closed system?
a.) an estuary where fresh and ocean water mix
b.) a living single-celled organism such as a phytoplankton
c.) a river that flows into the ocean
d.) a net constructed along a section of the river to separate the foreign fish species from the rest of the river

Select all the correct answers. which statements fail to meet the requirements of a scientific claim? a). 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. b). flowers that reflect the most ultraviolet light are more likely to attract bees and other pollinators than flowers that reflect less ultraviolet light. c). the evidence supporting newton's laws of motion was accurate in newton's time, but the universe operates differently today. d). even though evidence indicates that the solar system's planets follow elliptical paths, copernicus's model involving circular orbits is true.