Which of the following is NOT a process?

• natural selection

• cellular respiration

• photosynthesis

• genes

Answer explanation

A process is something requires a series of steps reesuting in a changed.

Photosynthesis changes sunlight carbon dioxide and water in to glucose and oxygen.

Natural selection is how a popuation changes over time - where the best adapted survive and reproduce more times.

Genes are a thing, not a "doing" or change

A new disease that attacks lions comes to an ecosystem. What is the likely result?

• All lions will die

• All lions will immediately become immune to the disease

• All lions will survive

• The best adapted lions will survive reproduce

Answer explanation

When there is a change in an environment, natural selection takes place.

The best adapted will survive longer, reproduce more times and their traits will become more common in the next generation of offspring.

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NGSS.MS-LS2-4

NGSS.MS-LS4-4

What type of change is a "drastic" change?

• Big

• Small

What would best describe a population with many genetic variations?

• All organisms in species have nearly identical characteristics

• One or two organisms within a species have characteristics very different from the rest.

• The overall populations of a species has many differences in characteristics.

Answer explanation

Genes code for traits and characteristics. If there is genetic variation within a species there will many differences in the traits of a population.

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NGSS.MS-LS4-4

Which species is more likely to survive environmental change? (a natural disaster, disease etc)

• A population with lots of variations

• A population with no variations

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NGSS.MS-LS4-4

What is an invasive species?

• A species that is native to a location. It originally evolved there.

• A species that goes extinct.

• A species that naturally migrates throughout a small region.

• A non-native species that was moved from one part of the world to another.

Answer explanation

An invasive species is one that is non-native (did not originally evolve in its new location). It is moved from one part of the world to another.

It disrupts the food web and outcompetes other organisms in its new location.

Their populations can get out of control because they have no natural predators, weather may be different in the new location and the disease that controlled their population where they are from do not exist in the new location.

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NGSS.MS-LS2-4

NGSS.MS-LS2-5

A biodiversity increases, ecosystem stability _________

• Increases

• Decreases

• Remains the same

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NGSS.MS-LS2-4

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What happens when organisms try to occupy the exact same niche (role) in an ecosystem?

• Organisms share the niche

• Both organisms find other niches

• The better adapted organism gets the niche while the other moves away.

• The less fit organism gets the niche and the other moves away

Answer explanation

A niche is the unique role an organism plays in an environment, including things like diet, making habits, when it eats and where it lives.

Two species cannot occupy the same niche. They will compete for the niche

Which of the following are examples of decomposers?

• raccoons

• fungi (mushrooms)

• bacteria

• worms

What is the role of a decomposer in an ecosystem?

• A decomposer breaks down dead organisms and recycles their nutrients

• A decomposer makes its own food by photosynthesis

• A decomposer is a type of predator, hunting prey

• A decomposer is an autotroph.

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