Which terms best complete the chart about characteristics of human development between fertilization and birth? a. 1) facial features form, 2) heartbeat can be heard, 3) nerve cells develop rapidly, b. 1) heartbeat can be heard, 2) nerve cells develop rapidly, 3) facial features form, c. 1) nerve cells develop rapidly, 2) facial features form, 3) heartbeat can be heard, d. 1) facial features form, 2) nerve cells develop rapidly, 3) heartbeat can be heard

Which of the following is a limitation of a clinical trial? a.)amount of random assignments b.)hospital cost c.)number of test tubes d.)amount of peer review

Earth is tilted on its axis. which of these would not exist if earth had no tilt?

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.