The function of respiration is to provide oxygen for use by body cells during cellular respiration and to eliminate carbon dioxide, a waste product of cellular respiration, from the body. In order for the exchange of oxygen and carbon dioxide to occur, both gases must be transported between the external and internal respiration sites.
Answer:
C. Bones
Explanation:
Bones fossilize over time, while hair, eyes, and organs, decay. This is why skeletons have no eyes, hair, and organs. And prehistoric fossils don't either.
Answer:
d. there is a relationship between smoking and lung cancer
Explanation:
a) it is NOT true becasue although the research show that is more likely to get lung cancer for smokers, it DOES NOT show that all smokers get cancer.
b) it is NOT true becasue altough it is very possible that smoking contributes to lung cancer, the research DOES NOT prove that smoking is the cause of lung cancer, it only indicates a relationship between smoking and lung cancer that is evidence that smoking contributes to lung cancer but it is not irrefutable proof.
c) it is NOT true becasue the research finds a relationship between lung cancer and smoking, but it is not focused in explaining smoking predispositionon. It does not investigate predispositions in people to smoke.
