The arrows in a food chain or web represents what?

They show what direction the energy is flowing between organisms.

They point to the organism that is being eaten.

It shows how sunlight flows within an ecosystem.

They represent how water is transferred within a habitat.

This diagram shows how energy flows through an eco-system. What is the first source of energy in this pyramid?

herbivorous fish, crustaceans and sea urchins

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 amounts are the same at each trophic level.

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

which is the correct order of the levels of organization from simple to complex?

organism, population, community, ecosystem

ecosystem, community, population, organism

If the hawk population decreases, what will happen to the snakes and rabbits?

Snakes will increase, rabbits will decrease

Snakes and rabbits will increase

Snakes and rabbits will decrease

Snakes will decrease, rabbits will increase

What will happen if the snake population is DOUBLED?

Grass and hawks will increase, rabbits will decrease

The other populations will increase too

The other populations will decrease

Rabbits and hawks will decrease, grass will increase

Decomposing bacteria feed on dead organisms and release nutrients into the soil. Without these bacteria, plants would ________?

Lack key nutrients necessary for survival

be healthier because of less disease

What would most likely happen to the levels of carbon dioxide (CO₂) in the air and biodiversity if a wildfire occurred in a forest ecosystem?

CO₂ levels would increase, and biodiversity would decrease.

CO₂ levels would decrease, and biodiversity would increase.

CO₂ levels would stay the same, and biodiversity would increase.

CO₂ levels would increase, and biodiversity would remain unchanged.

What would most likely happen if an ecosystem no longer received sunlight?

All living organisms would eventually die because the producers could not produce food

The number of herbivores would increase

The number of plants would increase

In this tundra food web, if grasses were removed what would happen to the sustainability of the ecosystem?

The ecosystem would collapse because it lost its main producer

There would be an overpopulation of arctic hares and lemmings.

Polar bears would move to a new ecosystem

Wildflowers would die out from the ecosystem

Invasive species cause damage to ecosystems by… ( 2 answers)

Outcompeting native species, causing the native species to decrease

Increasing native plant or animal populations

TWHS Unit 5 review

Authored by Oriana RamirezSilva

Biology, Science

9th - 12th Grade

NGSS covered

Used 17+ times

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91 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

A relationship between two organisms in which one organism benefits and the other is unharmed...

Mutualism

Commensalism

Parasitism

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A relationship between two organisms in which both organisms benefit.

Mutualism

Commensalism

Parasitism

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A relationship between two organisms in which one is benefited and the other is harmed.

Mutualism

Commensalism

Parasitism

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A flea feeds on a mouse’s blood. This is good for the flea but bad for the mouse.

mutualism

commensalism

parasitism

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Birds build nests out of dead twigs and leaves. They build their nests in living trees. This doesn't hurt the tree.

mutualism

commensalism

parasitism

A coyote captures, kills, and eats a rabbit. What type of symbiotic relationship is this?

mutualism

commensalism

parasitism

predation

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Remoras are small fish that swim close to or attach themselves to sharks. Remoras eat small scraps left as the sharks feed and the sharks are unaffected.

Competition

Predation

Mutualism

Commensalism

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TWHS Unit 5 review

A relationship between two organisms in which one organism benefits and the other is unharmed...

A relationship between two organisms in which both organisms benefit.

A relationship between two organisms in which one is benefited and the other is harmed.

A flea feeds on a mouse’s blood. This is good for the flea but bad for the mouse.

Birds build nests out of dead twigs and leaves. They build their nests in living trees. This doesn't hurt the tree.

A coyote captures, kills, and eats a rabbit. What type of symbiotic relationship is this?

Remoras are small fish that swim close to or attach themselves to sharks. Remoras eat small scraps left as the sharks feed and the sharks are unaffected.

Ostriches and gazelles eat together. They both watch for predators and danger. Since they see things differently, they each can identify threats the other animal may not see. Both species are benefited.

Producers get their energy from

Organisms that have to eat other organisms are called

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