A:B: Consumers C:D: DecomposersOmnivores Producers #5 What organisms break down the remains of plants and other organisms. These organisms are necessary to insure that the atoms recycle back into the environment.
A:B: The mice would increase The corn would decrease The hawks would decrease The mice would decrease The corn would increase The hawks would decrease C:D: BothNeither What would happen if the snakes are killed in this ecosystem? #20
A. The mice would increase The corn would decrease The hawks would decrease
A:B: The corn would increase, but all of the animals above the cricket on the food chain would decrease The mice would increase The corn would increase The hawks would increase C:D: BothNeither What would happen if a farmer sprayed a pesticide that killed all the crickets? #21
A. The corn would increase, but all of the animals above the cricket on the food chain would decrease
A:B: IncreasesDecreases C:D: Stays the same Sometimes increases and sometimes decreases In a food chain, the amount of energy ________ as it passes from one level to the next #22
A:B: Snake and hawk preying on the mouse Hawk and mouse preying on the shrubs C:D: Rabbit and snake preying on the cricket None of these #24 Give an example of organisms competing for a biotic factor in an ecosystem.
A:B: Changing ecosystems by cutting down trees Decreasing animal populations by hunting C:D: Decreasing water supplies through pollution All of these #27 How are humans increasing competition within ecosystems?