1. What is hemoglobin?

"Hemoglobin is a protein in your red blood cells that carries oxygen to your body's organs and tissues and transports carbon dioxide from your organs and tissues back to your lungs."

Hemoglobin is the protein in your red blood cells that carries oxygen to your body's organs and tissues and transport carbon dioxide from your organs and tissues back to your lungs. This small little protein in your blood does such a big task.

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the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.