What did Frederick Jackson turner think was essential for American democracy? A: territorial expansion

B: for it to be perfected home

C: direct election of senators

D: none of the above

Which scenario describes intraspecific, indirect competition? a. a peacock defends its territory against another peacock. b. lions and hyenas compete for the same prey animals. c. a male black bear eats fish in an area of a lake, so other black bears can’t. d. different species of birds fight over spilled popcorn on the ground.