What is the population of purter rico?

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?

Which statement about portugal is not true? a. it granted independence to its last colony in 1975 b. it has avoided conflict with spain c. it was a leader in european world exploration in the 1400s d. its economy is changing from agricultural to industrial b. it has avoided conflict with spain

Which region was the hearth for the largest number of agricultural animals such as pigs sheep and cows