Name two physical defenses that would protect your body against pathogens that might be found in a swimming pool.

Which barrier to economic development is shown in the following examples? i. the high rate of hiv infection in underdeveloped nations ii. the use of children as soldiers in uganda’s army in the early 2000s iii. low literacy rates in underdeveloped nations with limited exposure to adequate education a. foreign debt b. political instability c. widespread disease d. low levels of social welfare

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Which is the lipid molecule that controls what types of molecules can pass though?