Cervical lymphadenitis is usually caused by a viral upper respiratory infection. The key symptom of lymphadenitis is the presence of a painful mass in the cervical area, often accompanied by fever, runny nose, sore throat, and cough.
Question and answer. Which of the following defines evolution? a change in environmental conditions a change in an animal's physical traits a change in a population's gene pool a change in an individual's genetic. makeup. Evolution is a change in a population's gene pool.
Evolution is a change in type over time. It connects back to that human compulsion to label and categorize things, combined with a knowledge of how the world of the past was different than todays world. All sorts of things can evolve, so this may be the feature of Life found most often in things that are not alive.