5.L.2 Ecosystems EOG sample questions

This is a food chain that includes grass, a grasshopper, and a bird. grass → grasshopper → bird How is the grass in this food chain best described?

It is a producer, because it makes its own food

A food chain in an ecosystem includes blackberry bushes, deer, and wolves. •Deer eat blackberries. •Wolves eat deer. If the population of wolves decreases, how will this affect the population of blackberry bushes?

It will decrease because there will be more deer.

Which would most likely cause a decrease in a population of herbivores?

an increase in the number of carnivores

Which type of animal usually eats both producers and consumers?

an omnivore

What would most likely result if all plants in an area were destroyed?

Consumer populations would decrease because plants provide them with energy.

What would most likely happen if all of the decomposers in an ecosystem were removed?

The plants in the ecosystem would eventually die because of a lack of nutrients in the soil.

A mouse eats seeds and insects. Which best describes the role of the mouse?

consumer

Which classification best describes herbivores?

consumers

Which has the greatest effect on the amount of salt in a salt marsh?

the closeness of the marsh to the ocean

What will be most affected if the decomposers in an ecosystem are removed?

the quality of soil