Changes to Ecosystems Quizizz

Which two organisms do NOT compete (fight over the same food) for food resources?

• raccoon and water snake

• heron and raccoon

• heron and water snake

• water snake and bullfrog

Which of these would likely happen if frogs were removed from this ecosystem?

• The population of predators that eat frogs will increase (get bigger).

• The population of predators that eat frogs will decrease (get smaller).

• The population of organisms that frogs eat will decrease. (get smaller).

• All of the above

What could would most likely occur if all the producers in this ecosystem were removed?

• All the animal populations would increase (get bigger).

• The number of grasshoppers would increase (get bigger)

• All of the animals would either die or move away.

• None of the above.

According to the table, how many types of organisms obtain (get) energy directly from producers (they eat plants)?

• One

• Two

• Three

• Four

What is the role of bacteria in the table above?

• Decomposers

• Predator

• Producers

• Carnivores

Red swamp crayfish were brought into Berlin, Germany from the southern United States. The crayfish spread diseases to other animals. In what other way do crayfish most likely harm (hurt) other animals?

• By causing other animals to reproduce (have babies) more

• By competing with other animals for food

• By moving slower than most animals

• By eating foods that no other animals eat

A tiny insect called the hemlock woolly adelgid came to the United States from East Asia. Trees die when millions of these insects burrow (dig) into the trunks. This insect is slowly killing trees across the United States. How do the hemlock woolly adelgids most likely harm (hurt) animals?

• By eating other consumers

  
  

• By causing other insects to reproduce (have babies) more

  
  

• By destroying habitats of organisms who live in trees

• All of the above

According to the table, if there is a shortage of zebras (not very many zebras), which of these is least likely to happen (or probably will not happen)?

• The lion population would decrease (get smaller).

  
  

• Lions would eat the grass made available by fewer (less) zebras.

• Lions would hunt for other animals.

  
  

• The number of gazelles would decrease (get smaller).

What change would most likely occur if all the grass in this

ecosystem were removed (taken away)?

• The lion population would increase (get bigger).

  
  

• The zebra population would decrease (get smaller).

• The gazelle population would increase (get bigger).

  
  

• The number of consumers would increase (get bigger).

Which of these would likely happen if the zebra population

increased?

• The lion population would increase (get bigger).

  
  

• The lion population would decrease (get smaller).

  
  

• The producer population would increase (get bigger).

• None of the above.