Question

define weed give tow examples

Answer 1

Weeds are the unwanted plants that grow naturally without human aid at the side of a healthy plant

Answer 2

           A weed is any plant that requires some form of action to reduce its effect on the economy, the environment, human health and amenity. Weeds are also known as invasive plants. Many plants introduced into Australia in the last 200 years are now weeds.

Weeds typically produce large numbers of seeds, assisting their spread. They are often excellent at surviving and reproducing in disturbed environments and are commonly the first species to colonise and dominate in these conditions.

Shortly we can say that :

 weeds are unwanted plants that grow along with the crops.

examples: clover, dandelion, and purslane