The scientific study of prehistoric humans and their relatives is most accurately called ____
a. paleoanthropology
b. paleobiology
c. paleontology
d. paleoecology
e. paleopsychology
ANSWER: a
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Proto-oncogenes can change into oncogenes that cause cancer. Which of the following best explains the presence of these potential time bombs in eukaryotic cells?
A) Proto-oncogenes first arose from viral infections. B) Proto-oncogenes normally help regulate cell division. C) Proto-oncogenes are genetic "junk." D) Proto-oncogenes are mutant versions of normal genes. E) Cells produce proto-oncogenes as they age. Answer: B
The second edition of Bergey's Manual classifies bacteria ________.
A. numerically B. phonetically C. phylogenetically D. None of the choices are correct.
Oxygen has a negative influence on the formation of complex organic molecules because it ________ with them and changes their structure
Fill in the blank(s) with correct word
What maintains the secondary structure of a protein?
A) Ionic bonds B) Disulfide bonds C) Hydrogen bonds D) Peptide bonds