A student compared these diagrams. The student found that each of these organisms had a heart to pump blood. Which statement is supported by the student's findings?
(1) Some organisms are composed of one cell, while others are multicellular.
(2) Many multicellular animals have similar organs and specialized systems.
(3) The circulatory system in most organisms removes solid wastes from their bodies.
(4) All animals have identical circulatory systems.