Obligate anaerobes may be cultured in the laboratory
A. in a reducing medium.
B. in a standard incubator.
C. in standard Petri plates.
D. on blood agar plates.
E. in standard complex media.
Answer: A
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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.
The sex of the fruit fly Drosophila melanogaster is determined as follows: XX chromosomes give a female and XY give a male. The gene for bar eyes is recessive and located on the X chromosome. If two bar-eyed flies are mated, what percentage of the offspring will have bar eyes?
A. none B. 25% C. 50% D. 100%
Apical dominance is a result of the ________transport of auxin, which is produced mainly in shoot apical meristems.
Fill in the blank(s) with the appropriate word(s).
If you are studying the physical forms that organisms take, you are studying:
A) vestigial characters. B) morphology. C) comparative embryology. D) polygenic inheritance.