ecosystems review

Which of the following organisms is a consumer?

• bacteria

• hawk

• mushroom

Which of the organisms below would be a producer?

• algae

• mouse

• worm

Which organism below is NOT an example of a decomposer?

• leaves

• mushroom

• worm

A tree is an example of a _______________.

• consumer

• decomposer

• producer

All energy on Earth ultimately comes from what source?

• Water
• Sun
• Consumers
• Oxygen

How much energy is available to be passed on to the next level in an ecosystem?

• 100%
• 10%
• 50%
• 75%

The largest group of organisms found in a food web would be:

• Primary Consumers
• Producers
• Decomposers
• Tertiary Consumers

If a disease strikes the snake population in the food chain shown, what will be the initial effect on the populations of hawks and rabbits?

• The populations of hawks and rabbits will decrease.

• The populations of hawks and rabbits will increase.

• The population of hawks will increase. The population of rabbits will decrease.

• The population of hawks will decrease. The population of rabbits will increase.

What happens when the number of producers shrinks?

• The number of consumers increase.

• The number of decomposers increase.

• The number of consumers decrease.

• The number of producers increase.

Choose the complete and logical food chain.

• sun-plant-rabbit- eagle
• deer - squirrel- plant-sun
• sun -deer-plant- eagle
• eagle- squirrel-rabbit- plant- eagle