Why does the c horizon most resemble the parent material? please explain in detail.

The body is protected against harmful flu viruses by

What is responsible for the uneven heating between the poles and the equator on any given day

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.