Unit 1 - Ecology Test Review Quizizz

A researcher surveyed a grassland ecosystem and recorded the following population sizes:

• Snakes (25), Grasshoppers (1,200), Hawks (3), Grass (15,000).

• Using this information, order the organisms from those containing the most energy to the least in an energy pyramid.

• Grass → Grasshoppers → Snakes → Hawks

• Hawks → Snakes → Grasshoppers → Grass

• Snakes → Grass → Grasshoppers → Hawks

• Grasshoppers → Grass → Hawks → Snakes

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What happens to the energy that does not get transferred to the next trophic level in an energy pyramid?

• It goes back down to lower levels.
• It is lost as heat due to metabolism.
• It becomes body fat.
• It disappears.

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What is the ultimate source of energy for all life on Earth?

• Bacteria
• The Sun
• Plants
• Hot Cheetos

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During the process of ____________, producers use carbon dioxide, water, and the energy of the sun, to produce oxygen and _______________.

• Chemosynthesis; glucose
• Chemosynthesis; fiber
• Photosynthesis; nutrients
• Photosynthesis; glucose

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Is the majority of Earth's nitrogen readily available for plants and other living organisms to use?

• No, because most of Earth's nitrogen is trapped in geological reservoirs.

• No, because most nitrogen exists as nitrogen gas, which must be fixed before most organisms can use it.

• No, because nitrogen gas cannot be converted into other usable forms.

• Yes, because atmospheric nitrogen is directly available to most organisms.

The arrows in a food web show the flow of ________________ from one organism to another.

• water
• biomass
• carbon
• energy

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What is the only biogeochemical cycle that does not contain an atmospheric component?

• Carbon
• Water
• Nitrogen
• Phosphorous

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If the population of frogs were removed from this food chain, what would happen to the population of snakes?

• It would increase.
• It would decrease.
• It would stay the same.

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Which population of organisms, as a whole, has the MOST energy?

• The population of plants.
• The population of caterpillars.
• The population of frogs.
• The population of snakes.

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What type of organism can be located in a trophic pyramid as a primary consumer, secondary consumer, tertiary consumer, or quaternary consumer?

• Omnivores
• Producers
• Herbivores
• Carnivores

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