Natural selection is often described with the phrase "survival of the fittest." From the examples in this tutorial

and the variations you see in organisms around you, why do you think the phrase uses "fittest" rather than

strongest, brightest, or largest?

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.