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

Which of these organisms have the greatest amount of cell specialized

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with "basking lights" which act as an artificial sun. describe how the three methods of thermal energy transfer may take place within the iguana's enclosure.