Which of the following is a sign of poor quality water? (2 points)

question 2 options:

1)
zero turbidity

2)
a ph of 7.0

3)
high phosphate content

4)
high dissolved oxygen

The number of living organisms in a particular area is

This comparative chart is an example of one that might be used by scientists and law enforcement personnel for identification purposes. the chart represents a technological advance called

Can someone i have no idea of how to do this.