Final answer:
The statement that many organisms used in modern agriculture are a result of artificial selection is true. Artificial selection involves humans breeding plants and animals with desired traits, different from natural selection, which occurs without human intervention.
Step-by-step explanation:
Many organisms used in modern agriculture are indeed a result of artificial selection. This statement is true. Artificial selection, also known as selective breeding, is the process by which humans select plants or animals with desirable traits for reproduction, to enhance certain features in the next generation. A classic example is the breeding of crops with large seeds or livestock that produce more milk.
Artificial selection and natural selection are both mechanisms of evolution that lead to organisms better adapted to their environment. However, while natural selection occurs as a result of environmental pressures leading to the survival and reproduction of the fittest individuals without human intervention, artificial selection is driven by human choice, where only individuals with specific traits are chosen to reproduce.
Through artificial selection, humans have significantly modified various species over generations. This includes the creation of various dog breeds, as well as the development of agricultural crops and livestock with enhanced qualities like yield, taste, and resistance to diseases.