EOG REVIEW: Ecosystems

Which organism is a producer?

• Frog
• Mushroom
• Grass
• Lizard

Which is most responsible for recycling dead plants and animals in an ecosystem?

• Water
• Bacteria
• Fish
• Insect

How would the woodpecker population in a forest area most likely be affected if a housing development is built in that area?

• They would produce more offspring.
• They would change the color of their feathers.
• They would experience a decrease in available food.
• They would experience a decrease in competition.

Which two ecosystems are aquatic?

• estuaries and forests
• forests and grasslands
• saltwater marshes and estuaries
• saltwater marshes and tropical rainforests

Each food chain ends with which organism?

• consumer
• decomposer
• producer
• scavenger

In a grassland ecosystem, if the population of eagles suddenly decreased, what will most likely be the effect on the rest of the ecosystem?

• The ecosystem will become overpopulated with snakes.
• There will be a decrease in the population of snakes in the ecosystem.
• The nutrition of the soil in the ecosystem will decrease.
• More types of plants will begin growing in the ecosystem.

Which is an example of a decomposer?

• a hawk
• a flower
• a mouse
• a mushroom

Which will most likely cause a decrease in predator populations?

• an increase in prey populations
• a decrease in prey populations
• a decrease in decomposers
• an increase in producers

A simple food chain includes hawks, lizards, and insects. Which will most likely happen to the lizard and hawk populations if a pesticide is sprayed to kill the insects, and the lizard and hawk populations cannot find other food in this ecosystem?

• Both the lizard population and the hawk population will increase.
• Both the lizard population and the hawk population will decrease.
• The lizard population will increase, but the hawk population will decrease.
• The lizard population will decrease, but the hawk population will increase

As more people have moved to the beach, the sea turtle population has decreased. Which is most likely the cause of this decrease?

• tropical storms
• increase in predators
• habitat loss
• warmer temperatures