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SCIENCE PRACTICE QUESTIONS

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EXCRETORY SYSTEMS

1.

In mammals, the organ which deaminates excess amino acid to form urea is the

A.

kidney

B.

liver

C.

pancreas

D.

spleen

2.

The pigment in the skin responsible for skin colouration is

A.

xanthophyll.

B.

melanin.

C.

velamin.

D.

carotene

3.

The largest excretory organ of the human body is the

A.

liver.

B.

skin.

C.

pancreas.

D.

lungs.

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