题目Sugar-free beets that still taste sweet, tastier tomatoes and brighter-colored fruits and vegetables that stay ripe(熟的) longer are all foods that are being grown now. How can they carry traits (features), such as being tastier, brighter, and riper? They are genet...
carry traits, such as being tastier, brighter, and riper? They are genetically engineered.Genetic engineering(基因工程)is like making a change in a recipe. For example, when you make cakes, you mix together all of the usual ingredients. If you add an extra ingredient, li...