Gliding occurs between: a) flat bones or slightly curved bones. b) a rounded bone and a ring. an oval shaped projection and an oval shaped depression. c) a ball like surface and a cuplike depression. d) a convex surface and a concave surface.

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.