Unit 1 Assessment Review

Which process best describes how an ecosystem recovers after a disturbance like a forest fire?

• Primary succession

• Secondary succession

• Mutation

• Evolution

In a food web, if the snake population declines, which of the following organisms is most likely to experience an increase in population?

• Mice

• Hawks

• Plants

• Spiders

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-2

Which of the following conditions is most likely to lead to a reduction in biodiversity in aquatic ecosystems?

• Increased oxygen levels

• Introduction of invasive species

• Reduced nutrient levels

• Enhanced water clarity

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Which organism plays a key role in absorbing carbon dioxide and converting it into oxygen during photosynthesis?

• Fungi

• Herbivores

• Autotrophs

• Decomposers

Tags

NGSS.MS-LS1-6

What would most likely happen if the amount of dissolved oxygen in a lake drastically decreases?

• An increase in fish populations

• A decline in aquatic plant life

• A rapid growth of algae

• A reduction in animal species diversity

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

A researcher is studying the effect of different soil types on plant growth. What factor should remain constant to ensure the reliability of the experiment?

• Amount of sunlight

• Type of plant

• Amount of water

• Temperature

The introduction of wolves into a national park has helped regulate the deer population. Which effect might this have on the ecosystem over time?

• Increased biodiversity due to better plant growth

• A decline in predator species

• Reduced biodiversity due to fewer primary consumers

• Elimination of small mammals

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-2

Which of the following is the most energy-efficient transfer in a food chain?

• Plants → Herbivores

• Carnivores → Decomposers

• Herbivores → Omnivores

• Decomposers → Producers

Tags

NGSS.MS-LS2-3

What might be the impact of global warming on the Arctic ecosystem?

• Increased snowfall

• Decrease in sea ice, affecting polar bear habitats

• Expansion of tundra vegetation

• Enhanced carbon storage in soil

Tags

NGSS.HS-ESS2-7

NGSS.HS-ESS3-5

NGSS.HS-LS2-6

Which of the following is an example of an abiotic factor that can influence an ecosystem?

• Predator population

• Soil pH levels

• Herbivore feeding habits

• Number of decomposers

Tags

NGSS.MS-LS2-3