As a child grows, its skeleton becomes hard mainly because bones begin to store
(a) cartilage.
(b) minerals.
(c) proteins.
(d) carbohydrates.

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Solution

(b) minerals
Bones are made up of minerals like calcium.

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(a) bones
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Q. Question 13
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As a child grows, its skeleton becomes hard mainly because bones begin to store (a) cartilage. (b) minerals. (c) proteins. (d) carbohydrates.

(b) mineralsBones are made up of minerals like calcium.

As a child grows, its skeleton becomes hard mainly because bones begin to store
(a) cartilage.
(b) minerals.
(c) proteins.
(d) carbohydrates.

(b) minerals
Bones are made up of minerals like calcium.