ESS
Grade-7
Easy
Question
Select the correct statement.
- Living animals’ bones are made up of both organic and inorganic molecules.
- The mineralization of buried bone causes groundwater to percolate in the low level of the soil.
- All species’ fossil records have been thoroughly researched and comprehended.
- Neither of the sentences is correct.
The correct answer is: Living animals’ bones are made up of both organic and inorganic molecules.
Living bones contain both organic and inorganic components. Organic ones are mostly protein, which makes the bones less brittle. The inorganic is primarily composed of hydroxyapatite and calcium carbonate, resulting in bone rigidity.
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