No because an ellipsis purpose is to add suspension or drag the sentence of for the reader to question its purpose. This sentence uses the ellipsis with the purpose of a comma, adding a pause before explaining the subject further.
It would go Like My mother, My cousin, and I
It could possibly be a fruit or cooked (caught) fish. It depends on what your trying to do as in go on a vacation or your desserted and need food to live
You know you put this in the wrong subject cause this is a bio question.
Formal and impersonal. Applications are always formal.