3. What level of biological organization is made up of a group of similar cells that perform a speci function? A. Organ C. System B. Organism D. Tissue answer: 4. Which of the following differentiates organs from tissues? A Organs and tissues are made up of cells. B. Organs and tissues make up an organ system. C. Organs make up organ system; cells make up tissues. D. Organs make up organ system; tissues make up organs. answer: 5. Which of the following DOES NOT belong to the group? A. Eyes C. Mouth B. Large Intestine D. Stomach answer: 6. At which smallest level of organization in an organism can the characteristics of life be carried ou A Cell C. Organ System B. Organ D. Tissues answer:​