on the geologic time scale are marked by major, striking, and worldwide changes in the type of fossils present. a. Eras c. Epochs b. Periods d. all 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.