5.15 evaluate the potential for using genetically modified plants to improve food production (illustrated by plants with improved resistance to pests)

Crops can be genetically modified to increase yield. For example, making them resistant to insects/weed killers.

Making them insect resistant means farmers can spend less money on chemicals such as pesticides, this also increases yield.

making them resistant to weedkiller means farmers can kill weeds without killing the plant.

However, many people are against genetically modifying foods as there are no studies on long term effects on humans. There are also religious reasons. Also, if a weed gets the weedkiller resistance gene, there will be no way to kill it.