Which of the following is a reason that a scientist would want to use a model to study DNA? A. DNA may not really exist B. DNA is very small
C. DNA is very rare
D. DNA is very large

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.