3. Organs that work together to perform a related function are called A. Cells B. Organs C. Organs system D. Tissues 4. The human heart is an example of A. Cells B. Organ C. Organism D. Organ system 5. If you see cats, chickens and insects living together in your back yard, these is/are examples of a A. Community B. Ecosystem C. Population D. Species 6. A group of the same species living together is a(n) A. Biosphere B. Community C. Ecosystem D. Population 7. All living things on earth make up the, A. Atmosphere B. Biosphere C. Geosphere D. Hydrosphere 8. Which is the correct sequence - from the highest to lowest of the levels of organization in an organism? A. Cells Tissues Organs Organ systems Organisms Population — B. Cells - Organs Tissues Organ systems Organisms Population C. Tissues Cells Organs systems → Organ Organisms — Population D. Tissues → Cells → Organs Organ systems Organisms Community 9. All living and nonliving things found in a certain area make up a(n) A. Biosphere B. Community C. Ecosystem D. Population 10. Which of the following sequences of organization is likely to be seen in a multicellular organism, going from smallest to largest? A. cell, organ, tissue, organism C. cell, tissue, system, organism B. cell, organ, system, tissue D. organism, system, organ, tissue -​