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Biology A19 (20/20)
Answer to Question 19 is: D
Hydrogen, the carboxyl group, and the amino group are typically found in an amino acid molecular structure.
Select an Option and Proceed
Which of the following options alternates in an amino acid molecular structure?
A - Group R.
B - Dorsal fins.
C - Lateral Line System.
D - Placoderm.
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Proceed
Understanding Question 20
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