When an algal bloom occurs, what tends to happen next?

You and a friend live in different parts of Austin. Their nearest stream has very poor water quality. Your nearest stream has excellent water quality. What is most likely to be the reason for the difference?

Briefly explain why some people prefer to measure chlorophyll a instead of other factors to assess water quality.

Describe two factors that can affect the chlorophyll a concentration in a body of water.

Which of the following can be revealed (directly or indirectly) from high chlorophyll a concentrations in a body of water? Choose all that apply.

Because of modern medical advances, COPD is no longer a major health concern in the United States.

People with liver damage may have bleeding problems because:

You are more likely to seroconvert (become infected) after a needle stick contaminated with HIV then with one contaminated with Hepatitis B. (assuming you have not been vaccinated for HBV)

The major distinguishing characteristic of Hep D is that it:

Viral hepatitis predominately attacks the: