When taken to a new habitat, non-native plants often threaten native plants of the new habitat.  Why do they do this?

• Non-native plants are able to mutate rapidly
• Non-native  plants cause native animals to relocate
• Non-native plants are able to be used for medicine
• Non-native plants compete with native plants for resources

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If a blue catfish is introduced and eats the large fish who eat the smaller fish, what will happen to the population of the smaller fish?

• Increase
• Decrease
• Stay the same
• No affect on smaller fish

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What's one EFFECT of pythons invading the Everglades?

• the number of small mammals, like mice, are decreasing
• the number of white-tailed deer is increasing
• pythons can grow to be 18 feet long

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What is the role of decomposers in an ecosystem?

• Produce food

• Break down dead organic matter into nutrients

• Consume plants

• Hunt prey

Answer explanation

Decomposers play a crucial role in ecosystems by breaking down dead organic matter into nutrients. This process recycles nutrients back into the soil, supporting plant growth and maintaining ecosystem health.

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What would most likely happen if an ecosystem no longer received sunlight?

• The number of herbivores would increase
• The number of plants would increase
• all organisms would adapt
• All living organisms would eventually die

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What can imbalances in food webs lead to?

• Increased biodiversity

• Extinction of species

• More food production

• Stable ecosystems

Answer explanation

Imbalances in food webs can disrupt predator-prey relationships and lead to the decline or extinction of species. This occurs as some species may overpopulate while others may not survive, ultimately reducing biodiversity.

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A disease kills most members of a predator population. What is the MOST LIKELY effect on the prey population?

• It will also be killed by the disease.

• It will decrease in size.

• It will greatly increase in size.

• It will not be affected by the change in the predator population.

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What is an invasive species?

• An organism that is new to an environment that has positive effects on the environment.

• An organism that is native to an environment that has negative effects on the environment.

• An organism that is new to an environment that has negative effects on the environment.

• An organism that is native to an environment that has positive effects on the environment.

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