The answer is true, they are only single celled!
Answer:
120 centimeters equals 1.2 meters
Answer:
Explanation:
It is called a double circulatory system because blood passes through the heart twice per circuit. The right pump sends deoxygenated blood to the lungs where it becomes oxygenated and returns back to the heart. The left pump sends the newly oxygenated blood around the body.
Ozone would be the secondary pollutant because it is caused when two primary pollutants react. Hope this helps!
