1) which level of organization does the complete skeleton of mouse belong to a) cell b) a tissue c) an organ d) an organ system

2) an animal without backbone is called a) a vertebrate b) an invertebrate c) a chordate d) an endotherm

3) an animal that has body parts that are arranged around a central point has a) bilateral symmetry b) radial symmetry c) asymmetry d) a distinct head and tail end

4) the structures that an animal uses to exchange gases with it's surroundings make up the a) digestive system b) respiratory system c) excretory system d) circulatory system

5) the inputs for cellular respiration are a) nutrients and carbon dioxide b) energy and carbon dioxide c) nutrients and oxygen d) energy and oxygen

6) the outputs for cellular respiration are a) nutrients and carbon dioxide b) energy and carbon dioxide c) nutrients and oxygen d) energy and oxygen

7) in animals, which of the following body systems delivers nutrients and oxygen cells a) digestive system b) respiratory system c) excretory system d) circulatory system