What change in environment parallels the modification of the feet?

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.

What is the ecological role of food chains and food webs