Unit 2 Review

Question 1

Groups of different species that live together in a defined area make up a(n)

Accepted Answer

community

Question 2

The disappearance of a population in a given niche as a result of direct competition is called

Accepted Answer

competitive exclusion

Question 3

The average, year-after-year conditions of temperature and precipitation within a region

Accepted Answer

weather

Question 4

A relationship in which one organism is helped and another organism is neither helped nor hurt

Accepted Answer

commensalism

Question 5

Which of the following is the smallest level of organization studied by an ecologist?

Accepted Answer

Population

Question 6

All the biotic and abiotic factors in a pond form a(n)

Accepted Answer

ecosystem

Question 7

In the nitrogen cycle, bacteria that live on the roots of plats

Accepted Answer

change nitrogen gas into ammonia

Question 8

A type of symbiosis in which one organism benefits and the other is harmed

Accepted Answer

parasitism

Question 9

Which of the following would most likely cause an increase in atmospheric carbon dioxide?

Accepted Answer

increased burning of fossil fuels

Question 10

Natural disturbances, such as fires or hurricanes, can result in

Accepted Answer

succession

Question 11

The attachment of barnacles to a whale's skin is an example of

Accepted Answer

commensalism

Question 12

Which of the following is an abiotic factor affecting deserts?

Accepted Answer

low precipitation

Question 13

Which of the following is a Carnivore?

Accepted Answer

Owl

Question 14

Which of the following is NOT a method used by ecologists?

Accepted Answer

Ecologists study things?

Question 15

Nutrients move through an ecosystem in

Accepted Answer

biogeochemical cycles

Question 16

The sum total of the variety of organisms on Earth is referred to as

Accepted Answer

biodiversity

Question 17

All portions of the planet in which life exists, to include: land, water, and air.

Accepted Answer

Biosphere

Question 18

The series of steps in which a large fish eats a small fish that has eaten algae is a

Accepted Answer

food web

Question 19

The total mass at each trophic level can be shown in a(n)

Accepted Answer

biomass pyramid

Question 20

A form of symbiosis in which both organisms benefit is called

Accepted Answer

mutualism

Question 21

The water in an estuary is

Accepted Answer

mixture of fresh and salt water

Question 22

Which of the following is an Herbivore?

Accepted Answer

Cow

Question 23

All of life on Earth exists in a region known as

Accepted Answer

the biosphere

Question 24

A resource that cannot be replenished by natural processes is called

Accepted Answer

nonrenewable

Question 25

Autotrophs are organisms that

Accepted Answer

capture energy from the environment and make sugars

Question 26

Generally, which has the greatest effect on determining the climate of a region?

Accepted Answer

distance from the equator

Question 27

Which of the following organisms is a decomposer?

Accepted Answer

B

Question 28

If a population grows larger than the carrying capacity of its environment, the

Accepted Answer

death rate may rise

Question 29

Coral is

Accepted Answer

an animal

Question 30

The graph below represents

Accepted Answer

exponential growth

Question 31

Which biogeochemical cycle does NOT involve a stage where the chemical enters the atmosphere?

Accepted Answer

phosphorus cycle

Question 32

Assemblages of different populations that live together in a defined area.

Accepted Answer

Community

Question 33

A species that enters an environment where it has not lived before is called a(n)

Accepted Answer

invasive species

Question 34

The number of individuals of a single species per unit area is known as

Accepted Answer

population density

Question 35

Which of the following is an autotroph?

Accepted Answer

Loblolly Pine

Question 36

The movement of individuals into an area is called

Accepted Answer

immigration

Question 37

A group of individuals that belong to the same species and live in the same area.

Accepted Answer

Population

Question 38

Which of the following is a dominant plant species in a tropical rain forest?

Accepted Answer

orchids

Question 39

Which of the following human activities was NOT important in transforming the biosphere?

Accepted Answer

aquaculture

Question 40

A group of individuals belonging to a single species that lives together in a defined area is

Accepted Answer

population

Question 41

The maximum number of organisms of a species that can be supported by an environment is

Accepted Answer

carrying capacity

Question 42

The burning of fossil fuels may cause all of the following EXCEPT

Accepted Answer

the ozone hole

Question 43

A limiting factor that depends on population size is called a

Accepted Answer

density-independent limiting factor

Question 44

Density-independent limiting factors include

Accepted Answer

hurricanes

Question 45

In a tropical rain forest, the dense covering formed by the leafy tops of tall trees is called

Accepted Answer

the canopy

Question 46

Organisms that live near or on the ocean floor are called

Accepted Answer

benthos

Question 47

A group of ecosystems that have the same climate and similar dominant communities is a...

Accepted Answer

Biome

Question 48

The conversion of a previously soil-rich area to a sandy desert is called

Accepted Answer

desertification

Question 49

Civilizations could not develop without

Accepted Answer

agriculture

Question 50

The greenhouse effect causes an increase in

Accepted Answer

temperature

Unit 2 Review

Questions 50

Unit 2 Review

Questions 50