4. Which of the following shows set of properties of an element? A. Made up of big particles of atom.
B. Joined through chemical process.
C. Composed of one element with same properties.
D. Joined through mechanical process.

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.