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"Education is the most powerful weapon which you can use to change the world”
– Nelson Mandela

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8.9 Quiz

8.9 Quiz

Q Question 1 2 / 2 pts Almost all (99%) of the calcium in the body is used to Question 2 2 / 2 pts A person's bone density is highest at around age Question 3 2 / 2 pts What is the oxygen carrying protein of muscle cells? Question 4 2 / 2 pts Keshan's Disease is a result of _____________ deficiency. Question 5 2 / 2 pts Cretinism is due to ___________ deficiency

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1.provide rigidity for the bones and teeth. 2.30 years 3.Myoglobin