Ecology Quiz

Most of the lessons from a pyramid of energy infer that

• The energy lost as heat, waste, and metabolism is 10% of available energy at each trophic level

• Only half of the energy in one trophic level is passed on to the next level

• Most of the energy from one trophic level is incorporated into the biomass of the next level

• There is more energy available at the producer level than the consumer level

In a food chain 90% of the energy is lost in the transfer at each trophic level, and only 10% passes as usable biological energy. What will happen if secondary consumers are removed from a food chain?

• Producers will transfer more energy to the higher trophic levels of the food chain.

• Energy transfer in the food chain would be completely stopped

• Producers will transfer more energy to the higher tropic levels of the food chain

• aEnergy transfer to the highest trophic levels of the food chain

The energy pyramid of a wetland food chain is shown here. If the grasshoppers in a certain area receive 500 joules of chemical energy from the plants they eat in one day, what is a reasonable estimate of the amount of chemical energy the frogs in the same area will get from their food?

• 5 Joules

• 50 Joules

• 500 Joules

• 50000 Joules

In the food web below which organisms would be located at the bottom of the energy pyramid?

• carrots, rabbits, foxes

• foxes, owls, birds

• carrots, grasses, grains

• grasses, grasshoppers, birds

Which level of a food web contains the LEAST organisms?

• herbivores

• carnivores

• producers

• top level predators

Which level of a energy pyramid contains the MOST organisms?

• herbivores

• carnivores

• producers

• top level producers

In the image below, who has the LEAST amount of available energy?

• fox and owl

• mouse and deer

• bear

• grass

In the image below, who is in the 3rd trophic level?

• fox and owl

• mouse and deer

• bear

• grass

In the image below, if the fox has 80kcal how much energy does the grass have?

• 8000 kcal

• .8 kcal

• 800 kcal

• 8 kcal

Can an ecosystem be healthy (stable) if there are more top level predators than producers, such as 5,000 birds and 500 caterpillars?

• Yes

• No