Mary (age 65) has had diabetes for 40 years, with resulting damage to the small blood vessels in her feet and toes. Her circulation is impaired. How this condition might affects her vulnerability to infection?

Which process is involved in growing crops? irrigation transportation recreation condensation

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water