The ciliary muscle changes the shape of the lens
____________________ Indicate whether the statement is true or false.
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Diphtheria is considered to be an upper respiratory tract infection. However, it can have a very high mortality rate if not caught early and treated. Predict why this is so.
A. The patient cannot eat or drink and so basically starves to death. B. It makes a toxin that can be carried in blood and produce organ damage, particularly the heart. C. It successfully hides from the immune system of the patient. D. The bacterium moves from the throat to the brain, causing strokes to occur.
The original published articles describing the structure of DNA were authored by _____ and _____
a. Crick; Franklin b. Watson and Crick; Franklin c. Wilkins; Franklin d. Wilkins; Watson and Crick e. Watson; Crick
Which of the following domains share the most recent common ancestor?
a) archaea and eubacteria b) eubacteria and eukarya c) archaea and eukarya d) None of the above: all three domains evolved from different ancestors. e) None of the above: all three domains are equally related to each other.
The diarrhea associated with enterotoxigenic Escherichia coli (ETEC) is the result of:
A. Plasmid-mediated invasion and destruction of epithelial cells lining colon B. Mediated by cytotoxic Shiga toxins (STx-1, STx-2), which disrupt protein synthesis C. Plasmid-c, heat-stable and/or heat-labile enterotoxins that stimulate hypersecretion of fluids and electrolytes D. Plasmid-mediated A/E histopathology with disruption of normal microvillus structure resulting inmalabsorption and diarrhea