Which of the following best describes how systems within a multicellular organism contribute to the organism's overall function? Choose 1 answer: B The systems have unique roles, but interact in order to carry out the functions necessary for life. The systems can each carry out all of the functions necessary for the organism's survival. The systems carry out unique functions independently of one another, allowing the organism to carry out all of life's processes at the same time. Stuck? Review related articles/videos. Report a problem