Fill in the blanks
………..are the chemicals used to destroy weeds.

Identify the chemical substance that destroys the bacteria.

Fill in the blanks : (v)Certain chemicals also limit or prevent the function of an enzyme . There are called _______

The plant hormone used to destroy weeds in a field is:

Fill in the blanks in the following statements using the words given in the box . rusted , colourful , substance , chemical ,physical , reversible , iron oxide , object Making sugar solution is a ________change.