Question 2: CICRED homepage a platform for interaction between research centres and international organizations, such as the United Nations Population Division, UNFPA, WHO and ________.
Question 5: In ________, a population is the collection of inter-breeding organisms of a particular species; in sociology, a collection of human beings.
Question 6: However, the population of some countries, such as ________ and China is not even known to the nearest million[2], so there is a considerable margin of error in such estimates.