Dynamic stretches are part of an effective warm-up because they can
a)lubricate the muscles used in the activity
b) decrease cardiovascular difficulty in the activity
c)expand lung capacity for the activity d)build endurance for the activity

Disaster preparedness procedures should include assembling educational and entertainment materials for children. specifying how information will be shared with families. storing one gallon of water for each person. evacuating immediately if it is safe to do so.

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.

Which of these increases the risk. of developing cardiovascular disease