Particularly at risk for waterborne pathogens are a. young children b. elderly persons c. patients who have hiv/aids d. persons taking steroids e. all of the above

Why is it important that fibrin is insoluble in water?

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

Construct at least two possible hypotheses for the student’s experiment.