A controlled experiment allows the scientist to isolate and test a a conclusion,
b. one variable
c. several variables.
d. a mass of information.

What function does a limb serve in each animal how are the limb bones of the four animal similar based on the similarities what can be inferred about the evolution of the poor animals

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?