How is human population dealing with air pollution?

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.

During dna replication, each strand of dna is used as a template to produce a complementary strand of dna. this process is shown below. which base will attach to location

What are the four stages of cell signaling?