Life Science Common Assessment

What is the role of plants in an ecosystem?

• decomposer
• producer
• consumer

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Oxpeckers are birds that land on zebras and eat ticks that live on the zebra's skin. Ticks are insects that feed on the blood of animals. They can cause infection and spread disease. Select the correct relationship example from the relationship examples listed below.

• An oxpecker and a tick are an example of mutualism.

• An oxpecker and a tick are an

  example of parasitism.

• An oxpecker and a tick are an

  example of predator-prey.

Oxpeckers are birds that land on zebras and eat ticks that live on the zebra's skin. Ticks are insects that feed on the blood of animals. They can cause infection and spread disease. Select the correct relationship example from the relationship examples listed below.

• A zebra and a tick are an example of mutualism.

• A zebra and a tick are an example of parasitism.

• A zebra and a tick are an example of predator-prey.

Oxpeckers are birds that land on zebras and eat ticks that live on the zebra's skin. Ticks are insects that feed on the blood of animals. They can cause infection and spread disease. Select the correct relationship example from the relationship examples listed below.

• A zebra and an oxpecker are an example of mutualism.

• A zebra and an oxpecker are an

  example of parasitism.

• A zebra and an oxpecker are an

  example of predator- prey

If additional wrens are introduced into this ecosystem, there will most likely be an immediate decrease in the...

• frog population

• snake population

• falcon population

• grasshopper population

A partial food web and a table of the changes in the population of squirrels are shown. Select two effects caused by the change in the squirrel population between Years 1 and 4.

• The population of foxes will

  decrease.

• The number of green plants will decrease.

• The populations of foxes and owls will increase.

• The amount of green plants

  rabbits eat will increase.

• The populations of grass and green plants will stay the same.

Decomposers are important in the food chain because they.....

• produce their own food using light

  from the Sun.

• stop the flow of energy from one organism to another.

• break down dead organisms and

  recycle nutrients into the soil.

• are microscopic and other

  organisms cannot consume them.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Hummingbirds feed on the nectar of flowering plants. In this process, they also pollinate the plants. Which symbiotic relationship does this represent?

• predation

• mutualism

• parasitism

• commensalism

The round goby is a non-native fish species that was accidentally introduced into the lake ecosystem in the 1990s. Goby eat insects, worms, clams, and the eggs of many native fish. After their introduction, the population of goby fish increased quickly.

Which graph would be a good prediction of changes resulting from the introduction of goby?

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In an ecosystem, which is the major source of energy?

• Nutrients from the soil

• Sunlight

• Producers

• Decomposers