1) The smallest unit of life. a) Atoms b) Organelles c) Cells d) Tissues e) Organs f) Organ Systems 2) Which of the following describes a tissue? a) A group of organs working together b) A group of organ systems working together c) A group of organelles working together d) A group of tissues working together e) A group of cells working together f) A group of atoms working together 3) In multicellular organisms, cells are organized into groups that work together to perform a specific function. What are those groups of cells called? a) Systems b) Bones c) Tissues d) Joints e) Atoms f) Organelles 4) The stomach is a collection of tissue that contracts to help digest food? The stomach is considered to be a(n) ... a) Cells b) Tissue c) Organ d) Organ System e) Organelle f) Atoms 5) In the human heart, there are organs that pump blood through blood vessels. The combination of the heart and blood vessels are classified as... a) Tissue b) Body c) Organism d) Organ System e) Organ f) Organelle 6) Which of these shows the correct hierarchical sequence? a) A. organs, cells, tissues, organ systems b) B. cells, tissues, organs, organ systems c) C. organ systems, tissues, cells, organs d) D. tissues, cells, organs, organ systems 7) There are levels of cellular organization within multicellular organisms. Which of the following statements is true? a) A. Tissues are made up of organs. b) B. Organs are made up of organisms. c) C. Cells are made up of organ systems. d) D. Organ systems are made up of organs. 8) The liver is composed of cells called Hepatocytes. Many Hepatocytes together in the liver form... a) Cells b) Tissue c) Organ System d) Organisms e) Organelles f) Atoms 9) Which of the following statements describes an organ? a) A. The basic unit of structure and function in living things. b) B. A group of cells that work together to perform a specific function. c) C. A structure in the body that is composed of tissue. d) D. A group of organs that work together to perform a major function in the body. 10) What is the smallest unit of life inside of your body? a) Atoms b) Organelles c) Cells d) Tissues e) Organs f) Organ Systems

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