Which of the following is a good reason to use a simulation in an experiment?
O
A. To make an exact replication that is as complex as the real thing
O
O
B. To ensure that no two observations are exactly the same
C. To predict the outcome of an event in the real world
O
D. To avoid measuring volume with a graduated cylinder

What is hydroelectric power produced by?

Autotrophs a. consume their food to get energy b. may use photosynthesis to gain energy c. are also called consumers d. cannot use solar energy

Study the picture of the ocean. which is the best example of an organism’s niche shown in the picture? a. the environment contains several of the same species of coral. b. the shallow area of the ocean meets the needs of the coral and the fish. c. the ocean has fish and coral that live in the same area. d. the coral take in food from the water and provide shelter for the fish.