Cumulative Exam — Cumulative exam Answers

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41
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Soil compaction results from _______.

A
the reduction or elimination of pore space in soil
B
the weight of heavy machinery on soil
C
livestock walking over soil
D
all of the above
42
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Which of the following is not a manmade cause of global warming?

A
burning fossil fuels
B
deforestation
C
respiration
D
population growth
43

Which of the following statements about biodiversity is true?

A
Changes to biodiversity always positively affect an ecosystem.
B
Changes to biodiversity always negatively affect an ecosystem.
C
Changes to biodiversity can positively and negatively affect an ecosystem.
D
Changes to biodiversity never affect an ecosystem.
44

Which of the following biomes are considered temperate biomes?

A
deciduous forests and grasslands
B
chaparral and tundra
C
rainforest and tundra
D
alpine and deciduous forests
45

What types of organisms in an ecosystem will likely be affected by a flood?

A
producers, consumers, and decomposers
B
producers and consumers
C
consumers and decomposers
D
no organisms will be affected
46

All animals are _______.

A
producers
B
omnivores
C
herbivores
D
consumers
48

Which of the following is an example of natural erosion?

A
ice forming in cracks of rocks
B
acid rain falling on sidewalks
C
waves washing over rocks on the beach
D
water washing away soil in an area used by off-road vehicles
50

Wind, solar and geothermal power are called renewable energy sources because _______.

A
tax breaks for these sources are renewed every year
B
they are continuously replenished
C
humans can replenish these sources periodically
D
they produce few toxic byproducts
51

Territorial animals like spiders that fight off intruders would be expected to be _______.

A
regularly distributed
B
randomly distributed
C
clustered together
D
b and c
52

Which of the following two cycles are the most closely related in their role in sustaining life?

A
carbon and nitrogen
B
water and nitrogen
C
carbon and oxygen
D
nitrogen and phosphorus
54

Koala are a specialist species because they _______.

A
only eat eucalyptus leaves
B
are marsupials
C
live in trees
D
eat leaves
55

Which of the following is not true about plants?

A
their leaves absorb red and blue light, reflecting only the yellow and green light
B
light is a plant’s energy source
C
photosynthesis occurs in chloroplasts
D
photosynthesis occurs in mitochondria
56

Which of the following characteristics would be most crucial in land that is to be used for farming?

A
clear, distinct horizons with organic matter and mineral nutrients
B
no horizon development with large mineral deposits
C
large accumulations of organic matter
D
distinct horizons with minimal layers of organic material
58

Which of the following is not true about the evolution of biomes?

A
Both natural and artificial changes can cause the evolution of biomes.
B
Volcanic activity can result in the evolution of biomes.
C
Biome evolution is influenced by tectonic shifts that change the shape of continents.
D
Human activities cannot impact in the evolution of biomes.

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