Trophic Level CK-12

The producers represent the second trophic level.

FALSE

Which of the following statements best explains why most ecosystems will not have quaternary consumers?

There would not be enough energy to sustain a quaternary consumer level.

The energy and biomass decrease from lower to higher levels so there are rarely more than _____ trophic levels in a food chain.

4

The length of a food chain is the number of links between consumers.

FALSE

Roughly _____________ percent of energy is lost from the food chain each time it transfers to the next trophic level.

Ninety

Which of the following is an example of a tertiary consumer?

a snake that eats the frog

What is the same feeding position in a food chain or food web called?

trophic level

What is an example of a primary consumer?

-mouse that eats seeds -deer that eats grass -squirrel that eats acorns

Primary consumers are carnivores.

FALSE

The ultimate source of energy in ecosystems is from

the sun

Only _____ percent of the energy present at one level is available to the next trophic level.

10

Only about ___________percent of the energy at one trophic level is available to the next level.

10

About how much energy would be transferred to tertiary consumers if the producers begin with 25,000 kcal?

25 kcal

Why doesn't all of the energy available in primary producers transfer up the food chain?

B and C

A secondary consumer is a consumer in the fourth position on the food chain.

FALSE

A tertiary consumer eats only primary producers.

FALSE

An organism at a higher trophic level is always physically larger than its food at a lower trophic level. True or False?

FALSE

Ecologists can broadly lump all life forms into ten categories of trophic levels.

FALSE

Energy is recycled in a food chain.

FALSE

If after the producer level, energy has been passed through three more levels of the food chain, the trophic level of the second to last species in the chain would be the tertiary consumer.

FALSE

The carnivores (meat-eaters) which eat herbivores (plant-eaters) are called fifth level consumers.

FALSE

The ecological pyramid depicts how biomass and energy increase from lower to higher trophic levels.

FALSE

A tertiary consumer eats secondary consumers, but not primary consumers.

False

Which of these trophic levels has the least chance to exist in a food chain?

Fifth

A tertiary consumer can be a carnivore (meat-eater) that eats other carnivores.

TRUE

Ecological pyramids depict the relative amount of energy available at each trophic level in an ecosystem.

TRUE

Food chains can be diagrammed to show the amount of energy that moves from one feeding level to the next.

TRUE

Many consumers feed at more than one trophic level.

TRUE

Omnivores, who eat both plants and animals, eat both primary producers and at least one level of consumers.

TRUE

The first trophic level represented by plants is considered level 1.

TRUE

The third trophic level is represented by secondary consumers.

TRUE

What is a trophic level?

The position an organism occupies in a food chain

The biomass is the _____ mass of organisms at a trophic level.

Total

The _____ trophic level is known as the producer level.

first

In an example food chain, rabbits only eat plants. Which type of consumer are the rabbits?

primary