Algae growth and oxygen depletion in lakes and stream, and methemoglobinemia, caused by too much nitrate-nitrogen in drinking water.
The prokaryotic cell lacks a nucleus and membrane bound organelles.
Answer:
Adult cottonmouths are brown.
Explanation:
An observation is a fact that you can clearly see and don't have to guess if it is true or not.
b is the right answer because we breathe oxygen and when we breathe out we let out carbon dioxide
