You are told by your science teacher to set up an aquarium as a mini ecosystem. Which of the following are needed in setting up your aquarium A. Fish and water only
B. Water, sand and light only
C. Fish, snails, and plants only
D. Water, sand, soil and sunlight only

Internal feedback works to maintain homeostasis when your a. heart rate decreases as your white blood cells increase b. breathing rate decreases as your red blood cells decrease c. heart rate increases as your liver is cleaning blood d. breathing rate increases as your heart rate increases