Answers5120VA Environmental Science Sem ACareers in Environmental Science

Ecology 101 Answers

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In general the warmest biomes in the world are found _______.

A
at the poles
B
in the southern hemisphere
C
near the equator
D
on the western coasts of continents
3

What distinguishes the savanna and grassland biomes?

A
woody plants
B
large predators
C
seasonal precipitation
D
herds of herbivores
4

Environments are covered with manmade structures like roads, buildings, and sewers. Green spaces such as parks, backyards, and undeveloped lots are scattered in among the developed areas instead of all connected together. Plants and animals have to deal with exposure to toxins from vehicles and loss of habitat and food sources. These are all ways that _______.

A
humans have intervened to both manage and manipulate the environment to ensure species survival
B
nonhuman life in an urban ecosystem differs from that in an undeveloped forest ecosystem
C
cities have been developed to keep wildlife out of public areas
D
humans have impacted the environment and caused wildlife species to become domesticated
6

Identify the biotic factor of an ecosystem from the following:

A
soil composition
B
trees
C
temperature
D
sunlight
11

In general the warmest biomes in the world are found _______.

A
at the poles
B
in the southern hemisphere
C
near the equator
D
on the western coasts of continents
12

Biomes are defined by specific characteristics. Photo by Nomadz What characteristics would define the biome shown?

Question illustration
A
cool and windy with coarse gravelly soil
B
low-growing shrubs and large furry carnivores
C
cool and windy with small nocturnal carnivores
D
hot and dry with low-growing shrubs
13

The proper order, from smallest to largest, for the levels of organization is _______.

A
population, community, organism, biome, ecosystem, biosphere
B
organism, community, population, ecosystem, biome, biosphere
C
biosphere, biome, ecosystem, community, population, organism
D
organism, population, community, ecosystem, biome, biosphere
14

The defining characteristic of deserts is their high daytime temperatures.

A
T
B
F
15

Which ecosystem contains 32% of the world's producers?

A
terrestrial ecosystem
B
freshwater ecosystem
C
aquatic ecosystem
D
marine ecosystem
16

Only the water of marine ecosystems contains dissolved salt.

A
T
B
F
17

Which biome is prominent in North America?

A
taiga
B
savanna
C
rainforest
D
chaparral
18

Which of the following is not a freshwater ecosystem?

A
lakes
B
rivers
C
seas
D
springs
19

The principal characteristic that determines whether an aquatic ecosystem is classified as marine or freshwater is _______.

A
surface area
B
water depth
C
temperature
D
salinity
20

Savanna is considered a transitional biome because it is intermediate between two _______.

A
climates
B
regions
C
biomes
D
ecosystems
21

Scientists use specific levels of organization to analyze the biosphere. Which level of organization is seen in both a school of anchovies and a gaggle of geese?

A
ecosystem
B
community
C
population
D
biome
22

Biomes are unique and do not appear more than once on Earth.

A
T
B
F

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