LE Ecology Quiz

Which statement about the pyramid of energy shown below is correct?

• The amount of energy needed to sustain the pyramid enters at level D.
• The total amount of energy decreases with each successive feeding level from D to A.
• The amount of energy is identical in each level of the pyramid.
• The total amount of energy at level D is less than the total amount of energy at level B.

What is an ecosystem?

• A group of organisms of the same species living together.
• The total number of individuals in a population.
• A community of living organisms and their physical environment.
• A single organism in its natural environment.

What is the primary role of a producer in a food chain?

• To consume other organisms for energy.
• To decompose organic matter.
• To convert sunlight into energy through photosynthesis.
• To regulate the population of consumers.

The diagram below represents a food web composed of producers, consumers, and decomposers. Which group would most likely be represented in a food chain?

• biotic factors
• abiotic factors
• inorganic compounds
• finite resources

Which statement best describes some organisms in the food web shown below?

• Minnows and fish are primary consumers.
• Algae and floating plants are decomposers.
• Aquatic crustaceans are omnivores.
• Raccoons, fish, and ducks are secondary consumers.

The first organism in most natural food chains is:

• an herbivore
• a decomposer
• carnivorous
• photosynthetic

Base your answer to the following question on the energy pyramid and on your knowledge of biology. Which energy levels could contain carnivores?

• A and B
• B and C
• C and D
• D and A

The diagram below represents interactions between organisms in a stable ecosystem. Which statement correctly describes organisms in this ecosystem?

• Organisms in level B obtain their energy directly from the Sun.
• Organisms in level C obtain their nutrients directly from organisms in level D.
• Organisms in level A are herbivores.
• Organisms in level D are heterotrophic

Base your answers to the question on the diagram below, which represents a pond food web, and on your knowledge of biology. Which statement best describes what will most likely happen in the amphipod population is removed from this food web?

• Population sizes of species at feeding levels both before and after amphipods will decrease.
• Population sizes of species at feeding levels both before and after amphipods will increase.
• Population sizes of species at feeding levels after amphipods will increase and before amphipods will decrease.
• Population sizes of species at feeding levels after amphipods will decrease and before amphipods will increase.

The diagram below represents many species of plants and animals and their surroundings.

• a population
• a community
• an ecosystem
• the biosphere