How does the prevalence of the HIV virus in South Africa in 1990 compare to the prevalence in 2015? What does this suggest about South Africa’s AIDS prevention measures over that time span?

Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory

In the 1400s, portugal’s economy was based on a. industry b. exports c. finance d. trade

Under which condition below would u expect a coarse-grained intrusive rock like diorite to form?