Lesson 4: Practice Questions

A food chain from a pond is shown in the picture.

The relationship between the algae and mosquito larva is best described as _______

• 1. Predator and consumer

• 1. Parasite and host

• Producer and consumer

• Producers and decomposer

An oak tree provides food for many animals. The oak tree is found at which level of the energy pyramid?

• 1

• 2

• 3

• 4

In which direction does the energy flow in this food web?

• 
• 
• 
• 

The diagram represents energy flow between organisms. Based on this information, what is the role of the butterflies?

• 1. Producer

• 1. Carnivore

• Decomposer

• Herbivore

On a small island, scientists observed and graphed changes in wolf and moose populations. Use the graph to answer this question:

From 1965 to 1970, which data pattern did scientists observe?

• A drop in wolf population and a drop in moose population

• 1. An increase in wolf population and a drop in moose population

• 1. A drop in wolf population and an increase in moose population

• An increase in wolf population and an increase in moose population.

The diagram below shows a prairie food web. Use the diagram to answer this question: Which term best describes the coyote in this ecosystem?

• 1. Carnivore

• 1. Decomposer

• Herbivore

• Omnivore

The diagram below shows a prairie food web. Use the diagram to answer this question: What is the source of energy for the grasshoppers?

• 1. Bacteria

• 1. Prairie grasses

• Mice

• Sun

This clownfish has a layer of mucus on its scales that makes it immune to the sting of the sea anemone. The anemone has tentacles that it uses to capture prey. The clownfish hides from its predators in the sea anemone’s tentacles. In return for safety, the clownfish lures prey to the sea anemone and removes parasites from the sea anemone. Which of the following best describes the relationship between the sea anemone and the clownfish?

• 1. Commensalism

• 1. Mutualism

• 1. Parasitism

• 1. Predation

The food web diagram below represents the feeding relationships in an ecosystem. Use the diagram to answer this question: Which organisms are the decomposers in this ecosystem?

• 1. bacteria, flower seeds

• 1. bacteria, mushrooms

• 1. grasses, trees, flower seeds

• 1. grasses, trees, mushrooms

The food web diagram below represents the feeding relationships in an ecosystem. Use the diagram to answer this question: Describe two things that might happen if the population of grasshoppers and bark beetles were to suddenly disappear from this ecosystem.