What percentage of the earth is covered by ocean?

The organ that has two atria and one ventricle is the

Explain why the rate of urbanisation is in the way it is between developed and undeveloped countries.

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