Ecology Quiz Alt

Which of the following levels of organization is arranged in the correct sequence from the most specific to the highest level?

• community, ecosystem, organism, population, biome, biosphere

• Ecosystem, biome, biosphere, community, population, organism

• Biosphere, population, ecosystem, organism, community, biome

• Organism, population, community, ecosystem, biome, biosphere

According to this food web, which organism is a primary consumer?

• rabbit

• snake

• owl

• green plant

All of the energy on earth comes from the ________.

Ecologists use these to show how energy decreases at each succeeding trophic level.

• energy pyramid

• pyramid of numbers

• cladogram

• phylogenetic tree

Match the terms to their meanings.

• herbivores

• must consume other organisms (i.e. animals)

• producers

• eat only plants

• heterotroph

• produce their own food (i.e. plants)

• consumers

• self feeding organisms

• autotroph

• needs to feed on other organisms

Match the terms to their meanings.

• decomposers

• eat only meat

• carnivores

• breaks down dead organisms into organic matter

• omnivores

• eat both plants and meat

How much energy passes on to each trophic level of the energy pyramid?

• 10%

• 90%

• 100%

• 50%

Which 2 processes play key roles on the carbon-oxygen cycle?

• photosynthesis and cellular respiration

• evaporation and photosynthesis

• weathering and erosion

• cellular respiration and volcanic eruptions

The base of an energy pyramid is always composed of

• producers

• consumers

• decomposers

• apex predators

Even though our atmosphere is approximately 78% nitrogen it must be "fixed" before it can be used by plants. Which organisms "fix" the nitrogen?

• bacteria

• viruses

• animals

• plants