Ryder used front-end estimation to estimate the product of (–24. 98)(–1. 29). What was his estimate? –32 –20 20 32.

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.

Scientists observed a rock stratum with fossil. if mollusks evolved before arthropod, where will their fossils be found.

Match each fossil with the layer where it’ll be present based on those conditions.