10 Questions Biodiversity and Food Security Test your knowledge about how biodiversity is important to the world's food supply AMNH_Official, 03/14/2019 answers Play What is the practice of planting a single kind of crop called? Crop rotation Phototropism Monoculture GMOs Worldwide, 40% of all cropland is used to grow wheat, corn, and rice. True False In 1845-49, a million people died after a mold destroyed a monoculture crop. What crop? Corn Wheat Rice Potatoes … and 7 more awesome questions! Check them out by clicking “Play”.