Ecology Review Lesson

Multiple Choice

Which of the following best describes the concept of interdependence in ecology?

• Organisms rely only on themselves to survive.

• Organisms and their environment are completely separate.

• Every organism relies on every other organism to survive.

• Organisms do not interact with their environment.

Multiple Choice

A group of organisms of the same species living in the same place at the same time is called a(n) _________.

• ecosystem
• population
• community
• organism

Multiple Choice

A population of deer living in Washington County and a population of deer living in Wood County, WV are the same species.

• True

• False

Drag and Drop

Biotic factors are​

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things in an ecosystem. Abiotic factors are​

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things in an ecosystem. ​

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and ​

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are biotic factors. ​

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is an abiotic factor.

Drag these tiles and drop them in the correct blank above

Living

Non-living

Plants

Animals

Sunlight

Multiple Choice

What does biodiversity mean?

• Only one species in an area.
• The different amount of species in an area
• All abiotic life
• Nitrogen fixation

Multiple Choice

A small marine area has phytoplankton as its only producer.  Should the marine biologist be concerned about this ecosystem?

• No the fish do not need the phytoplanton. Since there are so many fish, there is high biodiversity.
• Yes, this ecosystem has low biodiversity.  Without a producer the herbivores will die out leaving no food.
• Yes, this system has high biodiversity; however the fish can adapt and get food from another source.
• Yes, the fish will overate to get all of the phytoplankton that is left, then they will die.

Multiple Select

What are some factors that affect ecosystems? Select all that apply.

• Size

• Carrying capacity

• Response to limiting factors

• Keystone species

Multiple Select

Which of the following are ways energy flow can be visualized in an ecosystem? Select all that apply.

• Food chain

• Food web

• Trophic pyramid

• Water cycle

Multiple Choice

Which trophic level contains the most energy in a healthy ecosystem?

• Tertiary consumers

• Secondary consumers

• Primary consumers

• Producers

Multiple Choice

Which of the following decreases as you move up the trophic pyramid in an ecosystem?

• Available energy

• Sunlight

• Water

• Temperature

Multiple Choice

Pesticides and herbicides eventually show up in higher-level consumers (i.e. as you go up the food chain) due to

• biomagnification

• climate change

• habitat destruction

• bioaccumulation

Multiple Choice

Toxin concentrations _____________ as you go up the food chain.

• do not change

• increase

• decrease

Multiple Select

Which of the following statements about producers (autotrophs) are correct?

• They use sunlight to make their own food.

• They are vital because all organisms need food.

• They depend on other organisms for food.

• They absorb their food from the soil.

Multiple Choice

What is the main difference between photoautotrophs and chemoautotrophs?

• Photoautotrophs use sunlight, while chemoautotrophs use chemical compounds for energy.

• Photoautotrophs eat other organisms, while chemoautotrophs do not.

• Chemoautotrophs use sunlight, while photoautotrophs use chemical compounds.

• Photoautotrophs and chemoautotrophs both depend on other organisms for food.

Multiple Choice

Organisms that depend on other organisms for food are called ___.

• heterotrophs
• autotrophs

• eatertrophs

• leeches

Multiple Choice

Which type of heterotroph consumes both plants and animals?

• Herbivore

• Carnivore

• Omnivore

• Producer

Multiple Choice

Which of the following best describes the role of decomposers in an ecosystem?

• They break down remains and release inorganic molecules back to the environment.

• They produce energy from sunlight.

• They consume only living organisms.

• They compete with producers for sunlight.

Multiple Choice

What is the term for a change in population size over time?

• Carrying capacity

• Growth rate

• Population density

• Exponential growth

Multiple Choice

What happens if a population exceeds its carrying capacity?

• The population will continue to grow indefinitely.

• Resources will become depleted and some organisms may not survive.

• The population will immediately go extinct.

• The ecosystem will stop regulating itself.

Multiple Choice

What is carrying capacity?

• A condition that occurs when two or more organisms compete for the same resources within an ecological community

• A relationship in which two organisms are mutually dependent on each other for survivial

• All the biotic and abiotic factors and the interactions among them in a given area

• The maximum number of organisms an ecosystem can support

Multiple Choice

What is biodiversity?

• The number of humans in an ecosystem

• The variety of life in an ecosystem

• The number of plants in an ecosystem

• The number of abiotic factors in an ecosystem

Multiple Choice

If a forest ecosystem experiences increased deforestation, what would likely happen to its carrying capacity?

• It would increase

• It would decrease

• It would remain unchanged

• It would fluctuate unpredictably

Multiple Choice

Which of the following activities is likely to have the greatest impact on biodiversity?

• Planting trees

• Building a road through a rainforest

• Recycling paper

• Using energy-efficient appliances

Multiple Choice

Why is genetic diversity important within a species to maintain a healthy ecosystem?

• It ensures all individuals are genetically identical

• It makes a species more susceptible to diseases

• It helps a species adapt to changes and survive diseases

• It has no impact on the health of an ecosystem

Multiple Choice

How does the introduction of non-native species typically affect local ecosystems?

• It enhances ecosystem stability by adding new species

• It has no noticeable effect on the ecosystem

• It disrupts local ecosystems by outcompeting native species

• It increases genetic diversity among native species