Autoimmune disease and allergies are examples of immune system disorders. Explain what each one is and how it affects your body

Which of the four major uses is predicted to change the least by 2020?

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

How can you keep track of variables in a science experiment?