The function of the pyloric sphincter is to a release acid chyme into the duodenum in periodic squirts. b release pancreatic secretions into the duodenum when chyme is present. c release bile into the duodenum when chyme is present. d retain acid chyme in the stomach until pepsin digestion is complete. e release bile and pancreatic secretions into the duodenum when chyme is present.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

answerhomologous structures;