A flowering yucca plant and a yucca moth have a relationship. The adult female moth lays eggs in the plant, and the young moths eat some of the plant seeds when they first hatch. The rest of the seeds are pushed out of the plant by the young moths, which helps them land in the soil and grow into new plants. This relationship is best described as
.

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.