Hemoglobin is the protein inside red blood cells that carries oxygen. Red blood cells also remove carbon dioxide from your body, transporting it to the lungs for you to exhale. Red blood cells are made inside your bones, in the bone marrow. They typically live for about 120 days, and then they die.
Answer:
Natural selection leads to evolution.
Well because death by starvation would be far more agonizing than death by predators. Starving to death would last longer and the death would be more excruciating.
Answer:
Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.
Explanation:
so ts Cellular Respiration
C. Ball and socket joints
Just took the test hope this helps :)