The Gram-negative chlamydiae are ________.
A. Gram-positive, spore-forming rods
B. obligate intracellular parasites
C. motile due to periplasmic flagella
D. photosynthetic
Answer: B
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Based on the fossil record, which of the following structures likely evolved first as plants made the transition to land?
A. leaves B. branches C. roots D. flowers
The bones of a bird's wing are similar to the bones of a bat's wing. This observation is an example of _____
a. uniformity b. evolution c. comparative morphology d. a lineage
If an error is made during replication that is not caught by DNA polymerase, the most likely is that _____
a. both strands of DNA will be mutated b. only the daughter strand will be mutated c. a mutation that causes cancer will occur d. DNA ligase will repair the mistake before a mutation occurs e. DNA replication will stall indefinitely
Please match the viral diagnostic method to its description.
Used to detect specific antibodies being produced against viruses A) PCR B) Immunological testing C) Electron microscopy D) Cell and tissue culture techniques E) Observation of the patient