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Ecology Test Review

Total questions: 31

Worksheet time: 16mins

Name
Class
Date
1.

Which of the following are considered biotic factors of an environment?

a)

temperature

b)

rock

c)

animal carcass

d)

cloud

2.

Which of the following are considered abiotic factors of an environment?

a)

animal carcass

b)

egg

c)

plant

d)

cloud

3.

Associate the following statements with the level of Biological organization they fall under: The light, sun, soil, air and living organisms within the Rainforest.

a)

organism

b)

population

c)

community

d)

ecosystem

4.

Associate the following statements with the level of Biological organization they fall under: The number of residents in Fort Worth

a)

organism

b)

population

c)

community

d)

ecosystem

5.

Associate the following statements with the level of Biological organization they fall under: All the living organisms in the Trinity River

a)

organism

b)

population

c)

community

d)

ecosystem

6.

Associate the following statements with the level of Biological organization they fall under: A leopard gecko

a)

organism

b)

population

c)

community

d)

ecosystem

7.

Which of the following statements is false?

a)

Tissues exist within organs which exist within organ systems.

b)

Communities exist within populations which exist within ecosystems.

c)

Organelles exist within cells which exist within tissues.

d)

Communities exist within ecosystems which exist in the biosphere.

8.

Which region would likely have the greatest amount of biodiversity?

a)

A cave region with one ecosystem, which supports small populations of many different species.

b)

A grassland region with one ecosystem, which supports very large populations of a few different species.

c)

A mountainous region with two ecosystems, each of which supports a few different species.

d)

A coastal region with three ecosystems, each of which supports many different species.

9.

Corals, and the zooxanthellae algae they contain, form the base of a coral reef ecosystem. Organisms like sea urchins feed on microorganisms that grow on the corals. Organisms including seahorses feed on plankton and fish that also inhabit the reef. Larger animals like sea turtles frequently enter the reef to forage. Seaweeds, which are competitors of corals, may grow along the reef bottom.

The biodiversity in a coral reef ecosystem can be changed by both natural and human activities. What is a natural factor that would have the greatest negative impact on the ecosystem's biodiversity?

a)

A sudden increase in the harvesting of corals, which decreases the coral population in the reef.

b)

A decrease in the level of inbreeding in several seahorse populations in the reef.

c)

The immigration of several new populations of sea urchins into the reef.

d)

The overgrowth of a population of seaweed, which prevents light from reaching the reef.

10.

Wheat crops are grown in a field. The seeds are genetically identical. Which of the following is the most likely effect of planting an entire field with these seeds?

a)

The population will have high biodiversity.

b)

The population will have high genetic variation.

c)

The population will be resilient to environmental changes.

d)

The population will be limited in how it adapts to changes.

11.

A sea otter's preferred meal is sea urchins. Without the otters, the urchin population would increase and overgraze on kelp forests. When sea urchins no longer have a predator, an over consumption of kelp takes place and other species are harmed. Otters are a species that influences the survival of many other species in an ecosystem. What type of species are otters?

a)

predators

b)

prey

c)

keystone

d)

endangered

12.

When there are no individuals of a certain species left anywhere on Earth, they are considered

a)

endangered

b)

extinct

c)

threatened

d)

keystone

13.

Any thing or organism that regulates the size of a population is known as

a)

carrying capacity

b)

biodiversity

c)

a limiting factor

d)

a food web

14.

A disease results in the death of one third of a dense population of bats. It spreads easily between the bats because there are so many of them. The disease is an example of:

a)

a density-dependent limiting factor

b)

exponential growth

c)

a density-independent limiting factor

d)

a nutrient-limiting factor

15.

For the graph below, what is the carrying capacity of Species 5?

a)

2000 organisms

b)

2500 organisms

c)

Day 23

d)

Day 15

e)

1500 organisms

16.

Which of the following would be a density independent limiting factor for the bunny population in California?

a)

amount of sunlight available

b)

amount of plants available

c)

a large wildfire

d)

appearance of a new virus like SARS-CoV-2 that affects deer

17.

When a population grows past the ecosystem's carrying capacity, what happens to the population?

a)

the population continues to grow

b)

the population starts to die off to return to carrying capacity

c)

the population will go extinct due to lack of resources

d)

the population grows then finds a new carrying capacity

18.

What benefits does society get from biodiversity?

a)

All of the answers are correct

b)

Clean freshwater

c)

Ecosystem stability

d)

Materials to produce medicines

19.

The greenhouse effect is a natural and important process that keeps the Earth’s surface warm enough to support life.

a)

true

b)

false

20.

The Atlantic Salmon is a highly desirable and very tasty fish. After the commercial fishing industry was established, their numbers dropped from 4 million to 700,000 between 1979 and 1990. What is this an example of?

a)

Over-harvesting

b)

Excessive logging

c)

Habitat destruction

d)

Habitat fragmentation

21.

How can habitat fragmentation due to land development disrupt an ecosystem?

a)

Too many new habitats are created.

b)

The habitat cannot support as large or diverse a population.

c)

Species are driven to extinction due to hunting.

d)

New species are introduced that displace existing species.

22.

Which of the answers below are not considered disturbances that would start a new succession.

a)

fire

b)

flood

c)

rain

d)

hurricane force winds

e)

volcanoes

23.

Primary and secondary succession are different because secondary succession has what at the start?

a)

soil

b)

rocks

c)

plants

d)

animals

24.

Which of the answers below that are considered pioneer species for a primary succession.

a)

flowers

b)

lichen

c)

grasses

d)

trees

25.

Select ALL of the answers below that are considered pioneer species for a secondary succession.

a)

bushes

b)

lichen

c)

grasses

d)

trees

26.

Is the image an example of primary or secondary succession?

a)

primary

b)

secondary

27.

Two students set up a terrestrial ecobottle chamber. It contains one small worm, rotting leaves and damp dirt. Below this, their partners set up an aquatic chamber. It contains rocks and a snail. The worm and snail end up dying the next day because:

a)

space was a limiting factor

b)

food was a limiting factor

c)

oxygen was a limiting factor

d)

sunlight was a limiting factor

28.

During respiration, _____ is consumed and _____ is released.

a)

oxygen, nitrogen

b)

oxygen, carbon dioxide

c)

carbon dioxide, oxygen

d)

nitrogen, carbon dioxide

29.

Which does not produce CO2?

a)

Photosynthesis

b)

Decomposition

c)

Respiration

d)

Burning Fossil Fuels

30.

All the carbon that exists is continually recycled in the carbon cycle.

a)

true

b)

false

31.

All living things contain carbon.

a)

true

b)

false