Ecosystem Relationships

What do consumers do in the food chain?

• They obtain energy from other organisms. 

• They break down dead plant and animal material. 

• They use sunlight to make food. 

• They are parasites of plants. 

A population of small fish and a population of small squids eat the same type of krill (a type of plant) in the same ecosystem. Krill is the main source of food for both the fish and squid. If the squid grows faster than the fish population, what will most likely happen to the fish population? 

• The fish population will stay the same size. 

• The fish population will start to grow faster. 

• The fish population will get smaller or even die out. 

• The fish population will start to eat more krill than the squids. 

Which of the following food chains shows the correct energy flow left to right? 

• rabbit-coyote-grass

• grass-rabbit-coyote

• coyote-rabbit-grass

• grass-coyote-rabbit

Which of the following adaptations would be most useful for a desert reptile? 

• long hair to keep it warm at night.

• white coloring to hide it from predators.

• webbed feet for quicker movement. 

• thick outer body covering to reduce moisture loss. 

Which of the following directly use the Sun's energy to produce their own food? 

• decomposers

• carnivores

• consumers

• producers

If the population of grizzly bears gradually increases over time, which of the following will most likely occur? 

• The number of prey species will decrease.

• The size of the bear population will continue to increase. 

• The bear population in that area will eventually die out. 

• The number of prey species will increase. 

What is the relationship between the Sun, plants, and animals in a food web?

• The Sun provides energy for both plants and animals to make their own food. 

• The Sun provides energy for plants to make their own food, and animals eat plants or other animals. 

• The Sun provides light so animals can see which plants to eat. 

• The Sun provides heat energy for animals to survive, but not plants. 

Which organism do the owl and the weasel compete for in the food web?

• Hawk

• Spider

• Grasshopper

• Shrew

Which of the following is a herbivore?

• cricket

• frog

• hawk

• shrew

A consumer that hunts is called:

• a producer.

• an omnivore.

• a predator.

• a herbivore.