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.
Convergent evolution is when different organisms evolve to display similar traits which serve similar functions. For example, the wings of a bat, bird, and bee are ... Evolution: Library: Whale Evolution - PBS Whale Evolution: Call it an unfinished story, but with a plot that's a grabber.