Scientists have confirmed by carbon dating that seeds dormant for up to 2000 years can successfully germinate. Based on the requirements for germination, what research expedition should you join in order to retrieve some ancient but viable seeds?
A. A trip to the Irish marsh, where wet peat creates anaerobic conditions, and your colleagues hope to unearth a bog mummy.
B. A trip to the arid Dead Sea region, where your historian colleagues have found a storeroom of wax-sealed jars.
C. A trip to the Burgess Shale in Canada, where your paleontologist colleagues have found fossils from the Cambrian era.
D. A trip to Indonesia, where the civet cat eats and expels coffee beans, producing a gourmet coffee known as Kopi Luwak.
Answer: B
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A) causes cells that hybridize with a fluorescent probe to fluoresce under UV light. B) compares the isotopic ratios of different compounds in the environment to determine whether they are of biological or geological origin. C) uses substrates containing heavy isotopes to label the DNA of organisms that use those substrates. D) compares the transcription of specific isotope labeled genes under different conditions.
Infection of the urinary bladder is called ________.
A. PID B. vaginitis C. urethritis D. pyelonephritis E. cystitis
Which of the following observations were made during Darwin's journey aboard the Beagle that led him to believe in evolution?
A. artificial selection and species variation B. geological formations and species variations C. geological formation and the fixation of species D. All of the above are correct.
Nitrates and nitrites are used in cured meats to prevent ________.
A. botulism intoxication B. S. aureus food poisoning C. infection from fruits and nuts D. mold growth