Worksheet: Organization of Ecosystems

In this worksheet, we will practice recalling and describing the levels of organisation within an ecosystem.

Q1:

Which of the following best defines habitat?

  • AA habitat is the area in which the organisms in an ecosystem live.
  • BA habitat is the maintenance of an organism’s optimal external conditions.
  • CA habitat is all the living and nonliving factors in an ecosystem.
  • DA habitat is all the nonliving factors in an area.
  • EA habitat is the area in which organisms function best.

Q2:

Which of the following best explains what it means if organisms are interdependent?

  • AOrganisms that are interdependent rely on each other for certain resources.
  • BOrganisms that are interdependent are able to survive without the existence of any other species.
  • COrganisms that are interdependent consume each other.
  • DOrganisms that are interdependent inhabit the same ecological niche.
  • EOrganisms that are interdependent will die without human intervention.

Q3:

Which of the following is not an example of interdependence in an ecosystem?

  • ABirds and animals help pollinate flowers and disperse the seeds of plants.
  • BViruses infect animals to reproduce within their cells.
  • CPrey animals provide food for carnivores.
  • DPlants provide food for herbivores and omnivores.

Q4:

Which of the following best defines an ecosystem?

  • AAn ecosystem is the total number of organisms of each species in an area.
  • BAn ecosystem is all of the living factors in an area.
  • CAn ecosystem is the total number of different species living in an area.
  • DAn ecosystem is all the living and nonliving factors in an area.
  • EAn ecosystem is all of the nonliving factors in an area.

Q5:

Communities within ecosystems can be divided into different groups. Which organisms would be classified as producers?

  • AProducers are organisms that can make their own nutrition.
  • BProducers are organisms that must eat other organisms to gain nutrition.

Q6:

Communities within ecosystems can be divided into different groups. Which organisms would be classified as consumers?

  • AConsumers are organisms that can make their own nutrition.
  • BConsumers are organisms that must eat other organisms to gain nutrition.

Q7:

The groups in a food chain are often referred to as trophic levels. Which of the following statements is correct about trophic levels?

  • AA primary consumer will be in a higher trophic level than a secondary consumer.
  • BA producer will be in a higher trophic level than a consumer.
  • CA consumer will be in a higher trophic level than a producer.
  • DA tertiary consumer will be in the lowest trophic level.

Q8:

The arrows in a food chain connect the different trophic levels. Which of the following statements is true about the arrows in a food chain?

  • AThe direction of the arrows shows the transfer of energy from one organism to another.
  • BThe color of the arrows indicates whether the organism is a carnivore or a herbivore.
  • CThe size of the arrows shows the amount of energy transferred between organisms.
  • DThe direction of the arrows shows the mating relationships between organisms.
  • EThe size of the arrows shows the amount of energy lost when an organism is consumed.

Q9:

The image provided shows a simple outline of a food chain.

Which organism(s) would be classified as a producer?

  • AKrill
  • BSeal
  • CPhytoplankton
  • DPenguin

Which organism would be classified as a primary consumer?

  • AKrill
  • BPhytoplankton
  • CSeal
  • DPenguin

Which organism would be classified as a tertiary consumer?

  • APenguin
  • BSeal
  • CKrill
  • DPhytoplankton

Q10:

Which of the following correctly compares ecosystems and habitats?

  • AHabitats are all the living and nonliving factors in an area, whereas an ecosystem is a specific area within a habitat where a population lives.
  • BEcosystems are all the living and nonliving factors in an area, whereas a habitat is a specific area within an ecosystem where a population lives.

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