Life Science Review

An ecosystem is a community of animals and plants interacting with their ____________.

• habitat
• climate
• environment
• community

Which is an example of an abiotic factor in a desert?

• Sun
• cactus
• scorpion
• snake

Which is an example of a biotic factor in a desert?

• Sun
• soil
• snake
• minerals

Which answer best describes a producer in an ecosystem?

• a living organism
• a living organism that produces its own food
• a living organism that produces its own food and is food for other living organisms
• a living organism that produces and consumes other living organisms

Which answer best describes a consumer in an ecosystem?

• A living organism that eats other living organisms
• Someone that buys something
• A living organism that produces food for other living organisms
• An abiotic factor

Which answer best describes a decomposser?

• an organism that produces oxygen
• an organism that is dead and decomposing
• an organism that is not natures recycler
• an organism that gets energy by breaking down dead organisms

How are deer and wolves classified?

• as decomposers

• as consumers

• as carnivores

• as producers

A food chain is shown.

plant -> grasshopper -> bird -> snake -> owl

What will most likely occur if there is a decrease in the bird population?

• The owl population will increase.

• The snake population will increase

• The plant population will decrease.

• The grasshopper population will decrease.

A student observes a small pond and notices green algae on the rocks. What is the role of algae in the pond ecosystem?

• producer

• consumer

• omnivore

• decomposer

The main function of a producer in an ecosystem is to

• absorb minerals from the soil.

• change water vapor into a liquid.

• make sugar through photosynthesis.

• break down dead plant and animal matter.