What might happen if humans could fix nitrogen on their own?

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

What is the difference between a scientific hypotheses and a scientific theory?

Jason, a dog breeder, decides to mate a poodle with a golden labrador retriever. he wants to get puppies with the curly hair of the poodle and the color of the labrador. what concept is shown in this example? question 6 options: artificial selection adaptation evolution natural selection