What could be a reason viruses are considered nonliving things

Witch of the following volcano hazards is made up of rocky particles about the size of a grain of sand

What would have happened to portugal’s trade if they had not found a way to sail around the tip of africa

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