Which statement best describes the flow of energy as it passes through the organisms in the pyramid?

Energy flows through the organisms from bottom to top and decreases at each level.

Energy flows through the organisms from bottom to top and increases at each level.

Energy flows through the organisms from top to bottom and increases at each level.

Energy flows through the organisms from top to bottom and decreases at each level.

Decomposers are important in the food chain because they

break down dead organisms and recycle nutrients into the soil

produce their own food using light from the sun

stop the flow of energy from one organism to another

are microscopic and other organisms cannot consume them

In a pond, the primary producer is a green alga, Spirogyra; the primary consumer is the crustacean, Daphnia . The secondary consumer is a small fish, the bluegill; and the tertiary consumer is a larger fish, the smallmouth bass. What changes can be expected in the pond if the Daphnia are killed with pesticides?

The smallmouth bass population will die.

The Spirogyra population will probably die.

The bluegill population will probably increase.

The Daphnia population will eat something else.

For the food chain shown, which of the following changes would have the most severe consequences?

a drastic decrease in rainfall, causing drought

the poaching of predatory hawks by game hunters

the introduction of a second predator that eats field mice

a parasitic infestation that reduces the cricket population

A group of students on a field trip observed the following organisms on an old oak tree: woodpecker, honeybee, oak, squirrel, beetle, and caterpillar. Which of the following food chains is most likely to be found in this ecosystem?

oak tree --> caterpillar --> woodpecker

caterpillar --> honeybee --> woodpecker

oak tree --> squirrel --> woodpecker

beetle --> woodpecker --> squirrel

The diagram shows part of an aquatic food web for a stable lake ecosystem in Connecticut. What is the source of energy for the algae?

rotifers, water fleas, and tadpoles

Suppose that a new predator of the rabbit migrated into this ecosystem. What is the most likely initial effect on the other organisms?

more competition among the hawks for food

more competition among the mice for food

less competition among the snakes for food

A chemical pesticide was applied to an area of this ecosystem by a landowner to control the mouse population. There was a decrease in the mouse population due to the presence of this pesticide. Which one of the following would most likely occur first due to this change in the ecosystem?

the rabbit food supply would increase

the amount of grass would decrease

the snake population would increase

the snake food supply would increase

The available chemical energy in this ecosystem _____.

decreases as it flows from producer to consumer

decreases as it flows from consumer to producer

remains constant as it flows from consumer to producer

increases as it flows from producer to consumer

How would the removal of earthworms from the food chain affect the other organisms?

The number of crayfish will decrease.

The number of bass will increase.

The crayfish will get their energy directly from the sun.

The number of bass and ospreys will increase.

A student examines the information in the table. The student concludes that Organism W should be placed at the base of the food web. However, the student later learns that Organism W's cells do not contain chloroplasts. Which conclusion would be appropriate, based on the new information?

Another organism in the marine ecosystem is a producer.

Organism W is a secondary consumer in the marine ecosystem.

The role of Organism T in the marine ecosystem changes during its life.

This marine ecosystem does not have any producers.

We get energy from the food we eat. The energy in the food first comes from the

vitamins added by food manufacturers

What do the arrows in the food chain indicate about the flow of energy in an ecosystem?

Energy flows in one direction in an ecosystem, from producers to consumers.

Energy is continuously recycled by the organisms in an ecosystem.

More of the available energy in an ecosystem is given to large animals than to small animals.

Organisms at the end of the food chain receive more energy than those at the beginning.

Food Webs and Chains

Authored by Michelle Carlson

Biology

9th - 12th Grade

NGSS covered

Used 22+ times

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36 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The picture shows an energy pyramid. What will most likely happen to the foxes and the wolves if the rabbits are removed?

The foxes will eat more wolves

The foxes will eat fewer wolves

There will be more foxes and wolves

There will be fewer foxes and wolves

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The picture shows an ocean bay food chain. Sea otters move into the ocean bay. They eat all the sea urchins. This change will cause the

kelp to have less food

crabs to have more food

sea ducks to have less food

arctic foxes to have more food

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

NGSS.MS-LS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which model correctly shows energy flow in a food chain?

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A marine food web is shown. Which organism below belongs in level 3 of this marine food web?

salmon

zooplankton

sea algae

polar bear

Tags

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A marine food web is shown. Which chart correctly shows three of the organisms according to their roles in cycling matter in the marine food web?

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

This picture shows the energy flow through a meadow community. Which of the following would most likely occur to the populations within the community of organisms immediately after a wildfire burns the environment?

Hawks would increase and foxes would increase.

Hawks would decrease and foxes would increase.

Meadow plants would increase and rabbits would decrease.

Meadow plants would decrease and rabbits would decrease.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

NGSS.MS-LS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement best describes what will happen if the population of herbivores in the community decreases?

The population of foxes will increase.

The population of hawks will increase.

The population of rabbits will increase.

The population of meadow plants will increase.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

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Food Webs and Chains

The picture shows an energy pyramid. What will most likely happen to the foxes and the wolves if the rabbits are removed?

The picture shows an ocean bay food chain. Sea otters move into the ocean bay. They eat all the sea urchins. This change will cause the

Which model correctly shows energy flow in a food chain?

A marine food web is shown. Which organism below belongs in level 3 of this marine food web?

A marine food web is shown. Which chart correctly shows three of the organisms according to their roles in cycling matter in the marine food web?

This picture shows the energy flow through a meadow community. Which of the following would most likely occur to the populations within the community of organisms immediately after a wildfire burns the environment?

Which statement best describes what will happen if the population of herbivores in the community decreases?

Which statement best describes the flow of energy as it passes through the organisms in the pyramid?

The diagram shows a simple food web. Which animal is classified as an omnivore?

The diagram shows a simple food web. Which of the following animals might compete with the coyote in this food chain?

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