The pharynx contains the tonsils, which protect against invasion of inhaled foreign particles.
Answer the following statement true (T) or false (F)
True
The tonsils form a protective ring at the junction of the oral cavity and the pharynx, and they contain lymphocytes, which protect against invasion of inhaled foreign antigens.
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The effector molecule that binds to the activator of the lac operon is:
A. lactose. B. glucose. C. cAMP. D. allolactose.
A requirement of cladistics is that a grouping must include ________.
A. a common ancestor and all its descendants B. species that can interbreed C. species with shared traits D. only living species
Which of the following is not a good feature of a plasmid vector?
a. multiple cloning site b. telomeres c. antibiotic resistance gene d. origin of replication e. blue/white selection system
Why is hyphal morphology (as opposed to a unicellular morphology) necessary for symptomatic vaginal candidiasis to develop?
A) The hyphal form causes hormonal changes in the patient which promotes dysbiosis. B) The hyphal form is easily sexually-transmitted. C) The hyphal form is resistant to anti-fungal drugs. D) The hyphal form displaces the normal bacterial residents of the vagina. E) The hyphal form produces proteases that cause cellular damage which results in inflammation.