Quiz about Ecosystems Unit 4 Test

Question 1

1. These organisms gets their energy from the sun through the process of photosynthesis.

Accepted Answer

Producers

Answer

Consumers

Answer

Decomposers

Answer

Heterotrophs

Question 2

2.These organisms breaks down the cells of dead animals and plants into simpler substance and releases them back into the soil.

Accepted Answer

Decomposers

Answer

Consumers

Answer

Producers

Answer

Heterotrophs

Question 3

3. A relationship between individuals from two different species that benefits both individual species.

Accepted Answer

Mutualism

Answer

Commensalism

Answer

Parasitism

Question 4

4. This is where a group of living and nonliving things interact with each other.

Accepted Answer

Ecosystem

Answer

Community

Answer

Consumer

Answer

Population

Question 5

5. Name the tertiary consumer in the food chain.

Accepted Answer

thrush

Answer

lettuce

Answer

greenfly

Answer

ladybird

Answer

cat

Question 6

6. Which one would be a primary consumer?

Accepted Answer

Grasshopper

Answer

Tree

Answer

Snake

Answer

Hawk

Question 7

7. Select all the biotic factors below?

Accepted Answer

Trees

Accepted Answer

Birds

Accepted Answer

Humans

Answer

Clouds

Question 8

8. This energy pyramid shows the flow of energy in an aquatic food chain. Choose the statement that correctly describes the flow of energy in this diagram.

Accepted Answer

As you move up the pyramid, there is less energy at each level.

Answer

Consumers in the pyramid transfer their energy back to the sun after they die.

Answer

Plants at the bottom of the pyramid get their energy from the soil they grow in.

Answer

Each level of consumer needs to make up for the decrease in energy by absorbing energy from the sun

Question 9

9. Why are there usually just a few organisms at the top of an energy pyramid?

Accepted Answer

So much energy is lost from one level to the next that the energy available can only support a few.

Answer

Organisms at the top are larger and require more living space.

Answer

Humans hunt organisms at this level

Answer

Decomposers have a bigger impact on the highest energy level.

Question 10

10. Which organisms in the food web are competing for the same resource?

Accepted Answer

Grasshopper, rabbit, and the deer

Answer

Shrew, snake, and the mountain lion

Answer

Shrew, rabbit, and the mountain lion

Answer

Snake, grasshopper, and the tree

Question 11

11. Scientists have been studying the size of three populations along the coast of Antarctica. In this ecosystem, penguins eat sardines (a type of small fish), and sardines eat zooplankton (very small animals that live in water). The data showed that all three populations were stable. Then the penguin population decreased suddenly. What will likely happen to the size of the sardine population as a result? The size of the sardine population will...

Accepted Answer

Increase because there are less penguins in the population consuming the sardine population

Answer

stay the same because a decrease in the penguin population does not affect the other organisms.

Answer

decrease because in one population causes a decrease in the sizes of all other populations in the ecosystem.

Question 12

12. A rabbit population has increased noticeably in the past ten years.  Which of the following best explains the increase in rabbit population?

Accepted Answer

The rabbit's main predator has been eliminated by human development.

Answer

Competition for food has increased among rabbits.

Answer

Abnormal weather conditions have decreased water levels of the local ponds.

Answer

An organism that relies on similar food sources has migrated into the area.

Question 13

13. A population of deer lives in Canada. Over 50 years, the size of the deer population decreased. What best explains the decrease in the size of the deer population?

Accepted Answer

There was a reduction in resources for the deer which lead to fewer deer surviving and less offspring being born.

Answer

A lot of deer died and no deer were born.

Answer

The deer population is always decreasing because deer are always being eaten.

Answer

More deer were born than died.

Question 14

14. Red-billed oxpeckers are birds. They eat parasites that bite and bother impalas. The impala gets rid of annoying parasites, and the red-billed oxpeckers get a meal. The relationship between the red-billed oxpecker and the impala is an example of

Accepted Answer

mutualism

Answer

parasitism

Answer

commensalism

Answer

predator/prey

Question 15

15. Remora are fish that attach themselves to sharks, usually near their mouths.  The remora feed on the leftovers of the sharks' meal.  The remora gets food, but it doesn't affect the shark in any way.  This type of relationship is called

Accepted Answer

Commensalism

Answer

Mutualism

Answer

Parasitism

Answer

Predator/pres

Question 16

16. Tapeworms live inside the stomach of cats.  Tapeworms eat so much of the cat's food that the cats become thin, sickly, and lacking nutrition.  This type of relationship is called

Accepted Answer

Parasitism

Answer

Mutualism

Answer

Commensalism

Answer

Predator/prey

Question 17

17. In the northwestern United States, both coyotes and wolves eat deer. The sizes of the populations have been stable for the last 6 years, but recently the size of the wolf population increased. What will likely happen to the coyote population? The size of the coyote population will . . .

Accepted Answer

decrease because there will be less energy available to the coyote population from the smaller deer population.

Answer

increase because an increase in the size of any population leads to an increase in the sizes of all other populations in an ecosystem.

Answer

stay the same because the coyotes and wolves do not eat each other.

Question 18

18. What do mammals like tigers and zebras need energy for?

Accepted Answer

all of the above

Answer

running

Answer

breathing

Answer

digesting food

Question 19

19. The Kudzu plant was introduced to the United States from China.  People thought it would make a nice shade plant for their front porches. Since then, Kudzu has spread throughout the South, taking over the habitat and resources of many native species. The problem with the Kudzu is an example of

Accepted Answer

Invasive species

Answer

Habitat destruction

Answer

Over harvesting

Answer

Deforestation

Question 20

20. Which of the following would most likely occur if a disease killed most of the hawk population?

Accepted Answer

The grass population would decrease due to an increase in rabbits and field mice.

Answer

There would be a decrease in the rabbit and field mouse population.

Answer

The skunk population would increase because its main predator has gone away.

Answer

The food web would remain pretty much the same because there are so many other organisms in it.

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