QUESTION 21 A study was done to test the effectiveness of echinacea in upper respiratory infections. One group of infections was given echinacea, the other group was treated with placebos. a. We do not have enough information to make any determinations in this case b. Echinacea is only effective in the treatment of a virus, it cannot help with an infection. c. Level of infection is the explanatory variable in this case. d. Level of infection was the response variable in this case. e. None of these answers.

What is the relation ship between structure and function in an organism

Which statement best describes a typical difference that could be found between the "analysis" and "conclusion" sections of a lab report? a) only the "conclusion" describes errors that occurred during the experiment, and only the "analysis" section suggests further research.b) only the "analysis" section includes specific data comparisons, and only the "conclusion" section suggests further research.c) only the "analysis" section discusses whether the original hypothesis was supported, and both sections include graphs of data.d) only the "conclusion section discusses whether the original hypothesis was supported, and both sections suggest further research.(the answer is b i just took the test)

Brainliest ! which would require more force to move or slow down between a bowling ball and a soccer ball? explain why?