Which of the following is not a part of an atom?
A) electron
B) molecule
C) neutron
D) proton
Answer: B) molecule
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Compared to viewing a distant object, a human viewing an object held within five centimeters of the eye requires a lens that _____
A) has been flattened, as a result of contraction of the ciliary muscles B) has been made more spherical, as a result of contraction of the ciliary muscles C) has been flattened, as a result of relaxation of the ciliary muscles D) has been made more spherical, as a result of relaxation of the ciliary muscles E) does not change its shape
Place the three primary cell layers of an embryo in order from superficial to deep
a. ectoderm ? endoderm ? mesoderm b. ectoderm ? mesoderm ? endoderm c. endoderm ? ectoderm ? mesoderm d. endoderm ? mesoderm ? ectoderm e. mesoderm ? ectoderm ? endoderm
What is one of the most damaging issues in freshwater systems that has caused the highest number of declines in fish?
A) pollution B) dams C) climate change D) ozone depletion
Current recommendations for the treatment of MRSA infections in the United States will change based on
A. the cost of different antibiotics. B. congressional approval. C. the availability of different antibiotics. D. patterns of antibiotic resistance.