The pollutants in 1970 were the highest since recorded history and are declining steadily.
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.
Answer: True
Explanation: DNA is a feature people have, as well as characters. You may look like your mother or father... But your features is what makes you look a certain way.
This may not be much help, but I tried!!!
Answer:
The human population would eventually grow too large to be sufficiently supported by the food available.
Explanation:
He found that food production did not increase at an exponential rate but instead increased more slowly.
