With few exceptions, organic compounds are those that contain
a. nitrogen.
b. hydrogen.
c. carbon.
d. oxygen.
e. all of the above.
C
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The spread of cancer cells from one site to others in the body is known as _____
a. cleavage b. metastasis c. benign transfer d. neoplastic movement
e. mutational slippageAn atom of nitrogen attracts electrons more strongly than an atom of hydrogen. In an ammonia molecule (NH3), which of the following best describes the electrical charge of the individual atoms?
A) The nitrogen is slightly more negative. B) The nitrogen is slightly positive. C) The hydrogens are strongly negative. D) The nitrogen becomes neutral. E) Charges balance out and none of the atoms has any charge.
Dr. Ratard was trying to determine the cause of a mysterious epidemic affecting fish in the gulf of New Mexico. His proposal that the deaths were caused by an organism called a protist is considered a(n)
A. experiment. B. hypothesis. C. data set. D. conclusion. E. theory.
A University of California psychology graduate student predicted that __________ could have been the reason why many girls in Salem, Massachusetts in 1692 began exhibiting strange symptoms that led to the Salem witch hunt.
A. ergot poisoning B. lichens C. truffles D. a fungal blight