To test the effect of red bull on running speed, a group of ten runners drink water before a race and are timed. A day later the same runners drink red bull before the race and are again timed. The times are compared and it turns out that they ran faster after drinking red bull. The running speed is the variable in this experiment.

Afamily has a y-linked disease that affects the father. what is the chance of a male offspring inheriting the same disease? oa. 100% ob. 50% oc. 25% d. 0%

Which type of respiration takes place when there is no oxygen present

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.