Xavier has been using a workout app to track his progress at the gym. lately, he has found that his average heart rate during aerobic workouts is 129. his lowest target heart rate is 137. which of the following will him get the most productive workout, based on the information he has gathered?
a. do anaerobic workouts only
b. do fewer aerobic workouts
c. increase the intensity of cardiovascular workouts
d. decrease the intensity of cardiovascular workouts

Microbes in the gut ferment fiber and complex carbohydrates and form vitamins, short chain fatty acids and

Explain what is meant by the phrase “ethical behavior”.

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.