Although you get wet while swimming, a tough protein within the skin prevents it from soaking up moisture like a sponge. This substance is
a. serous fluid
b. melanin
c. mucus
d. carotene
e. keratin
Answer: E
Although you get wet while swimming, a tough protein within the skin prevents it from soaking up moisture like a sponge. This substance is
a. serous fluid
b. melanin
c. mucus
d. carotene
e. keratin
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