Old pine stumps are dug up, split into pieces and sold as "fatwood." Fatwood is used as a fire starter. Why is this done?
A. The high concentration of volatile organic compounds makes the wood flammable.
B. Pine bark does not absorb water and is flammable.
C. The wood in the stumps is porous and dry, thus it burns easily.
Answer: A
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Studies of the origin of life on Earth help us to consider what would be required for life elsewhere in the Universe. Which of the following is most likely to be true of extraterrestrial life?
A. Carbon will act as the backbone for organic molecules. B. Light from a nearby star will make photosynthesis possible. C. Oxygen will be used to convert energy in cells. D. Water will not be required to sustain life.
In the following gene sequence, the original sequence is ABC* DEFGH. It now reads ABC* DGFEH. The * indicates the centromere. This type of mutation is a(n)
A) nonsense mutation. B) inversion. C) translocation. D) duplication. E) point mutation.
Which of the following organisms is likely to be transmitted via contaminated shrimp?
A) Trichinella spiralis B) Vibrio parahaemolyticus C) Giardia lamblia D) Clostridium perfringens E) Staphylococcus aureus
Bacterial food poisoning resulting from Clostridium (botulinum/difficile/perfringens) contamination is characterized by watery diarrhea accompanied by intestinal cramping but not fever, and it resolves in about a day.
Fill in the blank(s) with the appropriate word(s).