You've discovered a body in an ancient ruin quite similar to ours but with slightly different muscles. What function would make the most sense for a muscle made of skeletal tissue, with an origin position supra the sternum, stretched in an oblique pattern with a second, distal origin
position at the base of a rib? (Again, it's very similar to human musculature.)
of 1
Select one:
a. provide cushion for the ribs
b. allow ribs to spread apart when it breathes
c. contracts ribs to protect the heart
d. contracts to help the heart beat

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.