What is a weed killer??

Question

this is 4 a science project

Answer 1

weed is an unwated plant.

say if you are growing wheat and along with it some other plants also grow that would be a weed.

Weed killer is anything (a chemical may be) that kills a weed.

Answer 2

Cops :D

Answer 3

A chemical that kills plants - usually by disrupting a key metabolic pathway to prevent them from doing something like taking up water or performing photosynthesis.

Answer 4

Fisrtly define a "weed"

A weed is any plant that is growing somewhere that is is not wanted!

A weed killer is a substance that kills weeds, herbicide.