Dr. smith, a college instructor, is having difficult getting students to turn in papers. previously he had not assigned credit for homework; rather, he had simply assumed that students would do it for the practice. dr. smith establishes a policy that all students who turn in papers will get full credit for their work students now turn in papers much more often.
a. positive reinforcementb. negative reinforcementc. punishmentd. extinction

What parts of the cardiovascular system are affected with atrial fibrillation?

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.

When writing fitness goals we encourage using the smart method. what does s-m-a-r-t stand for? use full sentences to explain what each letter stands for in their goals setting process.