Which of the following lists the organization of a mammalian body from least to most complex?
A. Tissue-organ-cell-organ system
B. Cell-tissue-organ-organ system
C. Organ system-organ-tissue-cell
D. Tissue-cell-organ system-organ
E. Organ-organ system-tissue-cell
Answer: B
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The ultimate source of energy trapped during photosynthesis is
(a) CO2. (b) H2O. (c) O2. (d) sunlight.
What is the name of the enzyme that adds CCA to the 3' end of tRNAs?
A. tRNA nucleotidyltransferase B. Aminoacyl-tRNA synthetase C. RNA polymerase D. Peptidyl transferase
The pathogen Haemophilus influenzae B causes_____.
A) Meningitis in children B) Upper respiratory flu C) Endocarditis D) Genital chancroid
Which statement correctly interprets the graph? (Note, Paramecium caudatum is in red and Paramecium aurelia is in mustard color.) 
A. Paramecium aurelia drives Paramecium caudatum to near extinction. B. Paramecium caudatum drives Paramecium aurelia to near extinction. C. Paramecium caudatum and Paramecium aurelia are unable to exist, and both populations go extinct after 24 days. D. Paramecium caudatum and Paramecium aurelia are able to compete for the same resource, and their population densities are not affected.