There is a negative association between exercise and obesity. which of the following would a researcher need to demonstrate in order to make the claim that a lack of exercise causes obesity?

In 2009, a flu pandemic was believed to have originated when viral transmission occurred from pig to human, thereby earning the designation, "swine flu." although pigs are thought to have been the breeding ground for the 2009 virus, sequences from bird, pig, and human viruses were all found within this newly identified virus. what is the most likely explanation of why this virus contained sequences from bird, pig, and human viruses? a) the virus was descended from a common ancestor of bird, pig, and human flu viruses.b) the infected individuals happened to be infected with all three virus types.c) related viruses can undergo genetic recombination if the rna genomes mix and match during viral assembly.d) the human was likely infected with various bacterial strains that contained all three rna viruses.

Hi friends? i need new friends who are 18 years and younger im 16 lets be friends

Andrea's parents take her to a routine dentist exam. after examining andrea, the dentist applies a thin film on her healthy molars. what is this called?