Where should i study for sat 2subject test in chemistry and also in biology aside from barron book ? any source ? any : (

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.

Aggregation is the process of all of your data. a. gathering b. analyzing c. collecting d. observing

What is the “point system”? a. a penalty system that notes infractions made by drivers b. a system that rewards good drivers c. a way to calculate how difficult a driving maneuver is d. a computer system found in police stations what is the correct answer ?