He best way to classify two different organisms that have similar appearance and are found in the same environment is to A) compare cilia and flagella. B) use a stain to determine the acid-base balance. C) use gel-electrophoresis to compare DNA patterns. D) use nuclear membrane sampling in the case of prokaryotes.

The correct answer is option C

The best way to classify the organism when they appear similar and found in the same area must be observed by studying the genotype of the organism.

Sometimes it is not possible to observe the change in the organism by looking physically( phenotype) so, in this case we must use the gel electrophoresis to compare the DNA pattern.

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.