Different between annual plant and Biennial plants​

The graph below shows the reaction rates of four different chemical reactions. which of the reactions was most likely catalyzed by an enzyme? a. reaction d b. reaction c c. reaction a d. reaction b

Since color is not a very useful way to identify a mineral what other article property or properties can be used

When do scientists consider a hypothesis valid? a. when the hypothesis is testable b. when the hypothesis is published in a scientific journal c. when more than one person supports the hypothesis d. when experimentation shows it to be true