Eboni Barnes
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LEC. 20-22

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Eboni Barnes
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Exam 4 pt.2

Question 1 of 40

1

Nitrogen is taken from the atmosphere and converted into a form usable by plants through a process called

Select one of the following:

  • nitrification

  • nitrogen fixation

  • assimilation

  • ammonification

  • denitrification

Explanation

Question 2 of 40

1

Which of the following is NOT recycled in an ecosystem forever?

Select one of the following:

  • carbon

  • water

  • energy

  • nitrogen

  • phosphorus

Explanation

Question 3 of 40

1

An organism's niche includes

Select one of the following:

  • what it eats

  • what kind of environment it lives in

  • how wet or dry it is

  • the temperature

  • all of these

Explanation

Question 4 of 40

1

The complex of interconnected food chains in an ecosystem is known as

Select one of the following:

  • trophic levels

  • a food web

  • a biogeochemical cycle

  • succession

  • energy flow

Explanation

Question 5 of 40

1

An example of commensalism is

Select one of the following:

  • mistletoe living on a host plant

  • an epiphyte growing on a tree

  • mycorrhize

  • ants and flowering vines in Central America

  • a bacterium living on a dead leaf

Explanation

Question 6 of 40

1

A Type III survivorship curve would be observed

Select one of the following:

  • in humans

  • in annual plant populations crowded into a limited space

  • when mortality is concentrated later in life

  • in many tree species because many young seedlings die

  • when the probability of death is equally likely at any age

Explanation

Question 7 of 40

1

A goat pulling a plant out of the ground to eat is an example of

Select one of the following:

  • parasitism

  • predation

  • competition

  • commensalism

  • mutualism

Explanation

Question 8 of 40

1

Which of the following organisms would be found at the base of a pyramid of energy?

Select one of the following:

  • an herbivore

  • a primary consumer

  • a secondary consumer

  • an omnivore

  • a producer

Explanation

Question 9 of 40

1

Which contains the largest number of organisms?

Select one of the following:

  • community

  • ecosystem

  • population

  • biosphere

  • landscape

Explanation

Question 10 of 40

1

When you observe the growth rate of a population decreasing to zero, you can conclude that

Select one of the following:

  • all individuals in the population have died

  • the species has become extinct

  • the growth curve of the population has a J-shape

  • conditions are optimal

  • the carrying capacity of the environment has been reached

Explanation

Question 11 of 40

1

Herbivores are

Select one of the following:

  • primary consumers

  • secondary consumers

  • detritivores

  • omnivores

  • producers

Explanation

Question 12 of 40

1

A plant defense mechanism to escape predation includes

Select one of the following:

  • thorns

  • spines

  • a thick waxy cuticle

  • bad tasting chemicals

  • all of these

Explanation

Question 13 of 40

1

Two important decomposers are

Select one of the following:

  • bacteria and fungi

  • vultures and snails

  • snails and clams

  • bears and pigs

  • oaks and maples

Explanation

Question 14 of 40

1

Intraspecific competition

Select one of the following:

  • tends to limit the population size

  • usually results in one species being eliminated from an area

  • is not a significant factor in communities

  • includes predation and parasitism

  • is the same as predation

Explanation

Question 15 of 40

1

Which biome is characterized by thickets of evergreen shrubs and small trees?

Select one of the following:

  • chaparral

  • tropical rain forest

  • temperate grassland

  • temperate deciduous forest

  • temperate rain forest

Explanation

Question 16 of 40

1

What is most important for determining a biome's boundaries?

Select one of the following:

  • plants

  • animals

  • precipitation

  • temperature

  • precipitation and temperature

Explanation

Question 17 of 40

1

Hot summers and pronounced winters, moderate to high rainfall, and a dense canopy of broad-leaved trees over saplings and shrubs characterize the ____ biome.

Select one of the following:

  • savanna

  • tropical rain forest

  • temperate grassland

  • temperate deciduous forest

  • temperate rain forest

Explanation

Question 18 of 40

1

Which biome is characterized by rich topsoil and broadleaf trees that lose their leaves in winter?

Select one of the following:

  • boreal forest

  • temperate rain forest

  • temperate deciduous forest

  • tropical rain forest

  • savanna

Explanation

Question 19 of 40

1

Which biome is characterized by permafrost?

Select one of the following:

  • taiga

  • tundra

  • temperate deciduous forest

  • desert

  • grassland

Explanation

Question 20 of 40

1

High precipitation, cool summers, mild winters, and an evergreen forest characterize the biome.

Select one of the following:

  • temperate deciduous forest

  • temperate rain forest

  • tropical rain forest

  • taiga

  • chaparral

Explanation

Question 21 of 40

1

Mediterranean biome is affected by _________ air currents in summer.

Select one of the following:

  • ascending wet

  • clockwise turning

  • descending wet

  • ascending dry

  • descending dry

Explanation

Question 22 of 40

1

Which biome am I? I am found along the northwest coast of North America and have coniferous evergreen trees.

Select one of the following:

  • boreal forest

  • chaparral

  • temperate rain forest

  • tropical rain forest

  • grassland

Explanation

Question 23 of 40

1

The biome that can have enormous fluctuations of daily and seasonal temperatures is the

Select one of the following:

  • temperate deciduous forest

  • savannah

  • tundra

  • desert

  • none of these

Explanation

Question 24 of 40

1

Which biome is characterized by conifers and extremely cold winters?

Select one of the following:

  • boreal forest

  • tundra

  • temperate deciduous forest

  • desert

  • grassland

Explanation

Question 25 of 40

1

Hot summers and cool to cold winters, low to moderate precipitation, and the best agricultural soils in the world characterize the ____ biome.

Select one of the following:

  • savanna

  • chaparral

  • temperate grassland

  • temperate deciduous forest

  • desert

Explanation

Question 26 of 40

1

Which of following statements is correct?

Select one of the following:

  • Swamps are fulfilled with grass.

  • There are a lot of conifers in marshes.

  • Benthic zone is dominated by zooplanktons in ocean.

  • Estuaries and delta regions have very high primary productivity.

  • Rivers are stablized ecosystems.

Explanation

Question 27 of 40

1

Which biome am I? The weather is cool, and there is high precipitation and dense fog.

Select one of the following:

  • deciduous forest

  • chaparral

  • temperate rain forest

  • tropical rain forest

  • savanna

Explanation

Question 28 of 40

1

These two biomes are dominated by conifers:

Select one of the following:

  • tundra and taiga

  • boreal forest and temperate rain forest

  • temperate rain forest and tropical rain forest

  • chaparral and savanna

  • temperate deciduous forest and temperate rain forest

Explanation

Question 29 of 40

1

Today, the extinction of most species is due to

Select one of the following:

  • the destruction of habitats

  • pollution

  • the introduction of foreign species

  • commercial harvesting

  • controlling native pests

Explanation

Question 30 of 40

1

A threatened species is different from an endangered species in that a threatened species

Select one of the following:

  • is composed of individuals that cannot interbreed

  • is in imminent danger of extinction

  • is likely to become endangered in the near future

  • lives outside its range

  • has already become extinct

Explanation

Question 31 of 40

1

By definition, an area providing ecosystem services

Select one of the following:

  • is a hotspot

  • is important to the functioning of the ecosystem as a whole

  • is an example of in situ conservation

  • is an example of ex situ conservation

  • is undergoing restoration ecology

Explanation

Question 32 of 40

1

Global warming occurs because greenhouse gases

Select one of the following:

  • reflect visible radiation

  • absorb visible radiation

  • absorb infrared radiation

  • absorb carbon dioxide

  • reflect carbon dioxide

Explanation

Question 33 of 40

1

Which of the following statements concerning invasive species is FALSE?

Select one of the following:

  • they may compete with native species for resources

  • they may prey on native species

  • they may cause economic harm

  • they usually cause less harm to the native species than natural predators

  • they may spread to new areas on their own

Explanation

Question 34 of 40

1

The most effective way to preserve species is to

Select one of the following:

  • divide areas into fragments having separate species

  • divide areas into fragments that are far apart rather than close together

  • preserve habitats that have only a few species rather than many species

  • build roads in order to more easily access species

  • establish parks and reserves

Explanation

Question 35 of 40

1

Species richness is defined as

Select one of the following:

  • the number of species

  • the genetic variety within a population

  • the genetic variety within a species

  • the diversity among ecosystems

  • biodiversity

Explanation

Question 36 of 40

1

Increases in the amount of ____ in the atmosphere may be a threat to the world because of the greenhouse effect.

Select one of the following:

  • carbonate

  • carbon dioxide

  • helium

  • nitrogen gas

  • none of these

Explanation

Question 37 of 40

1

Which of the following is NOT classified as a greenhouse gas?

Select one of the following:

  • molecular nitrogen (N2)

  • surface ozone (O3)

  • carbon dioxide (CO2)

  • nitrous oxide (N2O)

  • methane (CH4)

Explanation

Question 38 of 40

1

Which of the following is NOT a probable consequence of global warming?

Select one of the following:

  • some species will disperse into new environments

  • Canada and Russia will decrease their agricultural productivity

  • some areas will have increased precipitation

  • some areas will have increased droughts

  • sea levels will rise

Explanation

Question 39 of 40

1

Which of the following is NOT a characteristic of endangered species?

Select one of the following:

  • they have an extremely localized range

  • they have low reproductive rates

  • they have specialized feeding habits

  • they live on islands

  • they are not endemic

Explanation

Question 40 of 40

1

Ex situ conservation

Select one of the following:

  • is the best way to preserve biodiversity

  • is exemplified by a national park

  • is exemplified by a national reserve

  • is exemplified by a marine sanctuary

  • is exemplified by a botanic guarden

Explanation

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