12.2 Pyramids

Which organism represents the trophic level containing approximately 0.1% of the initial amount of chemical energy produced by the plants?

• Aphids

• Spiders

• Sparrows

• Cats

Approximately what percentage of original chemical energy produced by the phytoplankton would be present in the population of humpback whales?

• 10%

• 1%

• 0.1%

• 0.01%

If 10,000 kcal of energy are present in the grass population, approximately how much energy would be expected in the population of lions?

• 1,000 kcal

• 100 kcal

• 10 kcal

• 1 kcal

What role are bacteria most likely filling in this food chain?

• Producer

• Consumer

• Apex Predator

• Decomposer

Which organism represents the trophic level containing approximately 10% of the initial amount of chemical energy produced by the plants in this food chain?

• Insect

• Bird

• Sun

• Grass

What happens to most of the energy that is not passed from one tropic level to the next?

• It is returned to the plant population

• It is used to convert CO₂ into sugars

• It is lost to the environment as heat

• It transforms into X-ray radiation

If 5,000 kcal of solar energy is converted into chemical energy by the algae population. About how many kcal of energy would be expected in the fish population?

• 500 kcal

• 50 kcal

• 5 kcal

• 0,5 kcal

Approximately what percentage of original chemical energy produced by the plants would be present in the bird population?

• 10%

• 1%

• 0.1%

• 0.01%

If 50 kcal of energy are present in the tomato

plants, approximately how much energy

would be expected in the spider population?

• 50 kcal

• 5 kcal

• 0.5 kcal

• 0.05 kcal

Approximately what percentage of original chemical energy produced by the tomato plants would be present in the aphid population?

• 10%

• 1%

• 0.1%

• 0.01%