Dr. Whitney wanted to study the structure of adolescents' peer groups. She pretended to be a newcomer to the community and attended the local high school. She met a group of students and eventually joined their group. This type of observation is called:

Which statement below accurately describes the carrying capacity of any ecosystem? a. it is not affected by any abiotic or biotic resources. b. it does not affect the species of an ecosystem. c. it is completely dependent upon the food supply. d. it is affected by both abiotic and biotic resources

Ineed answers fast how do conflict and cooperation among groups and organizations influence the development of the world? 1. choose two of the following topics: ethnicity and race, working conditions, immigration, military conflict, economic stability. 2. discuss how these two topics impact the development of countries. provide examples. 3. post your response to your teacher.

Which of these persons was a co-founder of twitter? eric schmidt jack dorsey tim cook paul alle