1.1. Herbicides are chemicals used in agriculture to reduce the growth of competing weeds. Research was carried out to determine how the use of a new herbicide “Weed Wonder” would affect the yield of corn.

Some fields in different farms were treated with “Weed Wonder” and the other fields were not.

Figure 1 below shows the results from the study. 

   Figure 1

Calculate the percentage increase in yield caused by the use of “Weed Wonder” in farm Q.

1.2. A scientist reviewing the data stated that no definite conclusions could be made when comparing the mean values between farms in Figure 1.

Justify the scientist's statement.

1.3. “Weed Wonder” inhibits proteins within the electron transport chain in the chloroplasts of weeds. 

Explain how this would affect the growth of weeds.