Which of the following is not made of protein?
a) hair
b) muscle
c) cellulose
d) enzymes

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.

Select the correct answer from each drop-down menu proteins are

Which hormone is used by both males and female?