What was the first eon of the Precambrian? Archean

Paleozoic

Phanerozoic

Hadean

Which best describes what you will do in the reaching your academic potential course?

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above

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.