Cluster 4 Day 2-Food Webs and Ecology

Cluster 4 Day 2-Food Webs and Ecology

Multiple Choice

In a desert environment, cactus wrens often build their nests in cholla cacti to avoid predators. This behavior does not hurt the cacti. Which type of relationship do cactus wrens and cholla cacti demonstrate?

• Competitive

• Commensalism

• Mutualism

• Parasitism

Multiple Select

Which of the following are producers?

• Autotrophs

• Oak Tree

• Heterotrophs

• Bobcat

• Arctic Fox

Multiple Choice

Which of the following is a primary consumer in the food web pictured?

• Snake

• Grasshopper

• Frog

• Eagle

Multiple Choice

Which is an example of a decomposer?

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

Multiple Choice

Which best describes how decomposers help support life in an ecosystem?

• Decomposers add nutrients to the soil.
• Decomposers provide a habitat in the ecosystem.
• Decomposers add producers to the ecosystem.
• Decomposers provide energy for consumers.

Multiple Choice

In this food web, if the hawk population increased, what would happen to the rabbit population?

• Decrease

• Increase

Multiple Choice

In this food web, which of the following might happen if the mouse population increased?

• The rabbit population would increase

• The rabbit population would decrease

• The snake population would decrease

Multiple Choice

One of the wolf populations begins to compete with a new bear population for the same herbivores. Over time, the herbivore population decreases. What is the limiting factor to the herbivore?

• Predator-Prey Relationships

• Herbivory Effect

• Competition

• Wolves and Bears

Multiple Choice

The wolf population gets reintroduced to the ecosystem. There is enough deer to go around, so they eat comfortably. The wolf population begins to grow out of control with so much food. The different wolf families then begin to compete for the few caves that exist. Not everyone has good shelter so some have to sleep in the forest floors. What is the limiting factor to the wolves?

• Overcrowding

• Competition

• Weather

• Lack of water

Multiple Choice

Sea turtles use beaches in Florida to lay their eggs. These beaches are now inhabited by humans and there are less places for the turtles to lay their eggs. This has resulted in a major reduction in the amount of turtles in the environment. Which of the following is a limiting factor in this ecosystem?

• Predator-Prey Relationships

• Competition

• Destruction of nesting sites

• Predation

Multiple Choice

Use the food web below to answer the question. Which of the following would result if the population of grasshoppers increased?

• The amount of grass and grains would increase

• The population of birds would decrease

• The amount of grasses and grains would decrease

• The population of owls would decrease