19. Which of the following amino acids does not absorb UV light? (A) Phenylalanine (B) Tyrosine (C) Glycine (D) Tryptophan

1. Which of the following is NOT a distinctive property of living systems? (A) Living organisms exhibit a high level of organization. (B) Biological structures are related to specific functions. (C) Living systems have the capacity for reproduction. (D) Living systems do not carry out energy transformation.