Final answer:
The concern most likely to be held by consumers in relation to genetically modified crops is that modified crops can cross-pollinate with other plants, potentially affecting biodiversity and non-modified crops. The correct answer is option: The modified crops can cross pollinate with other plants.
Step-by-step explanation:
Consumers might have various concerns about genetically modified crops, but one of the most common concerns is that modified crops can cross-pollinate with other plants. This potential stream of genes from genetically modified organisms (GMOs) into the wild or into other crops can carry unpredictable ecological consequences.
For example, it might impart the modified traits to wild relatives, potentially affecting biodiversity and possibly creating new weed problems for farmers. Despite the potential benefits of genetic engineering, such as improved crop yields, drought resistance, and pest resistance, the ecological implications of gene flow from transgenic plants to non-modified crops or wild plants continues to be a topic of discussion and research within agricultural biotechnology.