The example of the sugar glider, a marsupial and the flying squirrel, a rodent, illustrates that homology doesn't always indicate ancestry. this is dominant traits are passed down sexual selection. convergent evolution random chance

The answer is convergent  evolution. This occurs when animals that are not closely related evolve similar characteristics due to living within the same habitat/environment due to natural selection. Convergent evolution enables the organism to evolve analogous structures (which have similar form or function but were not present in their ancestors). 

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )