Trophic Levels EOC Review

Trophic Levels

BIO EOC Review

SC.912.L.17.9

(Also assesses SC.912.E.7.1.)

• Use a food web to identify and distinguish producers, consumers, and decomposers.

• Explain the pathway of energy transfer through trophic levels and the reduction of available energy at successive trophic levels.

Multiple Choice

What is the sun's role in the energy pyramid?

• to produce chemical energy for the ecosystem.

• to provide radiant energy for producers to convert to chemical energy.

• to start the energy flow of the ecosystem.

• to provide mechanical energy for producers to convert to chemical energy.

Multiple Choice

The diagram is intended to show relationships in an ecosystem. What do the arrows represent?

• The direction of population migration

• Differences in dietary habits

• Progressively smaller organisms

• The direction of the energy flow

Multiple Choice

In this energy pyramid, what is the proper name for ANY ORGANISM ABOVE THE PRODUCER LEVEL?

• decomposers

• consumers

• producers

• omnivores

Multiple Choice

The diagram represents different levels of a marine food pyramid. Between which two levels is the greatest amount of energy transferred?

• 3 and 4

• all equal amounts of energy being transferred

• 2 and 3

• 1 and 2

Multiple Choice

Which organism in figure 1 contains the most available energy?

• plants

• hawks and owls

• spiders

• foxes

Multiple Choice

What makes an energy pyramid different than a food web or chain?

• It shows energy flowing from the top of the chain and downward.

• The tropic levels are the opposite

• It shows the amount of energy in each trophic level

• It shows specific predator/prey relationships

Multiple Choice

A pyramid shape is used to show the amount of available energy at each trophic level because...

• energy decreases as you go up the food chain, just like the pyramid shape gets smaller as you go up.

• energy increases up the food chain just like the pyramid shape gets smaller as you go up.

• energy amounts are the same at each trophic level

Multiple Choice

Why are producers found at the base of the pyramid?

• They create all of the energy and therefore have the most energy of all of the trophic levels

• There are more plants than animals.

• They begin the flow of energy in an ecosystem.

• All of these answers are correct.

Multiple Choice

True or False. In this energy pyramid, the consumers on each level only get about 10 percent of energy that the trophic level before it has stored.

• True

• False

Multiple Choice

If only 10% of an organism's energy is available for the next trophic level, what happens with the other 90% of the energy?

• It is destroyed after it is used up.

• It is used for life processes or lost as body heat.

• It remains for the next trophic level IF the predator consumes ALL of the organism.

• It is lost completely as body heat.

Multiple Choice

The diagram represents a model of a food pyramid. Which statement best describes what happens in this food pyramid?

• More organisms die at higher levels than at lower levels, resulting in less mass at higher levels.

• When organisms die at higher levels, their remains sink to lower levels, increasing the mass of lower levels.

• Energy is lost to the environment at each level, so less mass can be supported at each higher level.

• Organisms decay at each level, and thus less mass can be supported at higher levels

Multiple Choice

In the energy pyramid below, which organism has the least amount of energy available?

• primary carnivore

• top carnivore

• producers

• herbivores