A straight-chain carbon compound constructed from _____ must contain at least one carbon-carbon double bond.
A. 6 hydrogen, 2 carbon
B. 6 hydrogen, 3 carbon
C. 6 hydrogen, 2 carbon, 1 oxygen
D. 8 hydrogen, 3 carbon, 3 oxygen
E. 14 hydrogen, 6 carbon
Ans: B. 6 hydrogen, 3 carbon
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For an accurate diagnostic of a current infection, acute and convalescent sera should reflect a(n) _____ in the patient's antibody titer of _____ doubling dilutions
a. decrease; two b. increase; two c. decrease; four d. increase; four
To make sure they treat the infection with the correct drug, doctors order DNA fingerprinting of a sample of bacteria taken from the patient for comparison to known fingerprints of strains A, B, and C. With which antibiotic should the patient be treated?
A patient is admitted to the hospital with a mysterious infection. After running some standard tests, doctors believe that the infection is caused by one of three closely—related bacterial strains — A, B, or C — that are hard to treat because they have become resistant to some antibiotics.
Strain A is resistant to antibiotic beta and antibiotic omega
Strain B is resistant to antibiotic alpha and antibiotic omega
Strain C is resistant to antibiotic alpha and antibiotic beta
A. antibiotic alpha.
B. antibiotic beta.
C. antibiotic omega.
D. antibiotic beta or antibiotic omega.
E. any antibiotic will work to kill the bacteria causing the infection.
What property of water allows it to stick to objects and make them wet?
What will be an ideal response?
In aquatic ecosystems, primary productivity is most dependent on
A) species richness and diversity B) the type of soil C) the rate of photosynthesis D) organic nutrients E) inorganic nutrients