12. Which is the correct sequence - from the lowest to highest-of the levels of organization in an organism? a. Cells Tissues Organs Organ systems Organisms Population Community Ecosystem Biosphere b. Cells Tissues Organs Organ systems Organisms Community Population Ecosystem Biosphere c. Cells Organs Tissues Organ systems Population Community Ecosystem Biosphere Organ Organisms Population d. Cells Tissues-Organs systems Ecosystem Community Biosphere. 13 Which of the following is the simplest level of ecological organization? a. population b. An ecosystem c. community d. An individual or species 14. How do you call the collection of organisms that belong to different populations but all live in the same area and interact with one another? a. Community b. Ecosystem c. Ecosphere d. Population 15. What level of biological organization is made up of a group of similar cells that perform a specific function? d. Tissue a. Organ b. Organ System c. Organism 16. What level of biological organization that is made up of one or more organ systems? a. Organ b. Organ System c. Organism d. Tissue 17. Which of the following DOES NOT belong to the group? a. Eyes b. Mouth c. Large Intestine d. Stomach 18. What is the name of the organelle that contains chlorophyll and is only found in plant cells? a. Cell Wall b. Chloroplasts c. Centriole d. Cytoplasm 19. Which of these structures helps plant cells maintain their rectangular shape? a. Cell Wall d. Nucleus b. Chloroplast c. Cell Membrane structures controls all the activities of the cell? 20. Which of these a. Cell Wall b. Chloroplast c. Cell Membrane d. Nucleus Organisms