True or false? (circle one)
skin, hair, and nails are all made of keratin....
![Biology](/tpl/images/cats/biologiya.png)
Biology, 03.02.2020 20:58, lekaje2375
True or false? (circle one)
skin, hair, and nails are all made of keratin.
![answer](/tpl/images/cats/otvet.png)
Answers: 2
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