Which structure of the organism work together to carry out all of its life functins?

List four observations that indicate that a chemical reaction may be taking place

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

Which statement best describes the he properties of iconic compounds ?