7. Which is a characteristic of dark matter?* 1 point
it interacts with baryonic matter
it has not been observed directly.
it interacts with electromagnetic radiation.
O
humans can see it
O
Pls help

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.