What are chromosomal mutations?

Acar traveld with an average speed of 60 miles per hour for 2 hours. how far did it travel

What are the steps of how energy is transformed in plant cells?

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?