Which of the following is evidence that supports the theory of evolution? -fossil evidence
-Genetic variation
-anatomical evidence
-all of the above

Why should the united state be concerned about air pollution in china?

The study of interaction between living organisms and their enviroment is called (a) phytogeography (b) ecology (c) phytosociology (d) ecosystem

Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.