AnswersAG Q1 Environmental Science 26-27 EMulacSuccession

Succession — Cumulative exam Answers

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21
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The chaparral biome has adapted to suppress wildfires.

A
T
B
F
22
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The population of bison in a prairie ecosystem has significantly declined. What will most likely happen to the grass population the bison feeds on?

A
The grass population will increase.
B
The grass population will decrease.
C
The grass population will be wiped out.
D
The grass population will remain unchanged.
23

Which of the following species is an R-selected species?

A
Giant tortoises
B
Mosquitoes
C
Elephants
D
Redwoods
24

Mammals do not live in the tundra, because the climate is too extreme.

A
T
B
F
25

Which of the following best describes energy transformations in ecosystems?

A
Most energy in a lower trophic level is passed to higher trophic levels.
B
Heat is not a significant waste product as energy passes between trophic levels.
C
Most of the energy collected by an organism is not passed on to other organisms.
D
Tertiary consumers collect the most energy in an ecosystem.
26

Which of the following statements about biodiversity is not true?

A
Changes to biodiversity never occur naturally.
B
Changes to biodiversity can lead to a decrease in ecosystem stability.
C
Changes to biodiversity can positively and negatively affect on an ecosystem.
D
Changes to biodiversity can lead to an increase in ecosystem stability.
27

Freshwater biomes have _______.

A
organisms adjusted to high salinity
B
more diversity than marine biomes
C
a salinity of less than 1%
D
the ability to maintain their temperature year round
28

Deciduous forests receive most of their 30 to 60 inches of annual precipitation in the summer.

A
T
B
F
29

Which of the following statements about the phosphorus cycle is true?

A
In living organisms, phosphorus can be found in nucleic acids.
B
Phosphorus in aquatic ecosystems is only found in sediment.
C
Elevated levels of phosphorus in aquatic ecosystems is always beneficial.
D
The soil plays no part in the phosphorus cycle.
30

Aquatic ecosystems support more primary producers proportional to their area than terrestrial ecosystems.

A
T
B
F
31

Arrange the events of succession after a volcano erupted in their proper order.

A
pioneer species, plant growth, soil formation
B
pioneer species, soil formation, plant growth
C
soil formation, pioneer species, plant growth
D
soil formation, plant growth, pioneer species
32

Which of the following about abiotic factors in ecosystems is true?

A
Abiotic factors in healthy ecosystems are not in balance.
B
Abiotic factors are located in the soil of ecosystems only.
C
Abiotic factors are part of a dynamic system.
D
Abiotic factors in ecosystems are used up by the living components.
33

Because of their small supplies of water, deserts are not a crucial biome on Earth.

A
T
B
F
34

What system includes oxygen, nitrogen, and ozone?

A
geosphere
B
hydrosphere
C
atmosphere
D
biosphere
35

Fires are important to savanna ecosystems, but not to grassland ecosystems.

A
T
B
F
36

Decomposers such as fungi break down the nutrients in dead plant and animal matter for use by _______.

A
producers
B
primary consumers
C
secondary consumers
D
tertiary consumers

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