Biology, 26.11.2019 00:31 ramamullapudi3639
Among the natural defenses present in tears is the protein lactoferrin. as youcan infer from its name, it is also present in milk and other body secretions, andits function involves binding iron ions. the presence of lactoferrin in tears isprotective against bacterial infection . all pathogens must acquire iron from their environment andlactoferrin ensures that the iron concentration is low. b. pathogens with magnetosomes will be segregated from the eye tissueand swept away by the tears. c. free iron serves as an immune signal to recruit t cells to the eye. d. in the presence of lysozyme, as found in tears, the proteins form aprotective barrier on the lens.
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Which of the following diseases may be transmitted through an accidental needle stick? a. syphilis b. tuberculosis c. cellulitis d. hepatitis b
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Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. magnesium is an important component of chlorophyll. the concentration of magnesium ions is higher in the root-hair cells of plants than in the soil. which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll? osmosis diffusion passive transport active transport
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The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these
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The fruit of a certain plant is sweet and fleshy. the seeds of this plant have a seed coat that is fairly tough. the seeds germinate better if they are exposed to acid, or scarification. what is the most likely type of dispersal for this seed? water animal wind
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Among the natural defenses present in tears is the protein lactoferrin. as youcan infer from its nam...
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