In biology class one day, mrs. chabon wrote six physiological functions on the board. then, she asked groups of students to each choose the three functions that are purposes of the excretory system. these are the lists they made.

group 1: maintaining ph level of blood; transporting hormones throughout the body; regulating growth

group 2: removing wastes from the body; digesting solid foods; maintaining salt and water balance

group 3: maintaining salt and water balance; maintaining ph level of blood; regulating growth

group 4: removing wastes from the body; maintaining ph level of blood; maintaining salt and water balance

which group correctly listed the functions of the excretory system?

I'm between group 2 and 4. But, i am leaning towards group four. 

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 : )