The hedgehog's spines are modified hairs made of ____________________

Fill in the blank(s) with correct word


keratin

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?Which type of cast iron undergoes a transformation as a result of a long heat-treating process to reduce hardness?

A. ?gray B. ?white C. ?malleable D. ?nodular

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Why is it important to inspect safety equipment before each use?

What will be an ideal response?

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Bending stresses may develop in an arch if the supports at the ends of the arches shift because of:

A. structural stiffening. B. drag or base isolation. C. resonance or negative pressure. D. settling soil or thermal expansion.

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Convert octal 54 to decimal

A) 5810 B) 4410 C) 7610 D) 6410

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