Which statement about the phosphorus cycle is false?
A) The main abiotic reservoir for phosphorus is in the water.
B) Plants release dissolved phosphate ions into the soil.
C) Phosphates that drain from soils into the sea become part of new rock and will cycle back into living organisms.
D) Guano can be used by farmers to add phosphorus to the soil.
Answer: A
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a. insertions only b. deletions only c. substitutions only d. both insertions and deletions e. insertions, deletions, and substitutions
A test used to identify antibodies against Treponema pallidum in a patient's serum is the
A) direct fluorescent-antibody test. B) indirect fluorescent-antibody test. C) direct agglutination test. D) direct ELISA test. E) hemagglutination-inhibition test.
Which of the following skin infections is caused by a protozoan?
A) leishmaniasis B) dermatophytic infections C) otitis externa D) cutaneous candidiasis E) cutaneous anthrax
Carriers of Staphylococcus aureus have no symptoms, and don’t know they are carriers unless they have a culture performed.
A) True B) False