Answers26-27 - C - RUSD Environmental Science S1Freshwater and Marine Biomes

Freshwater and Marine Biomes — Unit test Answers

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21
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Which of the following is not an example of interactions between biotic and abiotic factors in an ecosystem?

A
flowers opening at dawn and closing at night
B
bears hibernating in winter
C
male elk fighting over a female
D
Monarch butterflies migrating to Mexico for the winter
22
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Cycles are essential to all living organisms.

A
T
B
F
23

Nitrogen-fixing bacteria convert atmospheric nitrogen into forms of nitrogen that living things can use. Please select the best answer from the choices provided

A
T
B
F
24

Which of the following is most likely to be a limiting factor for growth on the floor of a tropical rainforest?

A
water
B
shelter
C
sunlight
D
prey
25

Which of the following statements is true?

A
The nitrogen cycle is the most important cycle for life.
B
The oxygen cycle is the least important cycle for life.
C
Life can be sustained without any of the cycles for life present.
D
All cycles of matter are equally important for life to be sustained.
26

How are the carbon, nitrogen, and oxygen cycles similar?

A
They are all biogeochemical cycles.
B
They all involve an interaction between living and nonliving elements.
C
They are all part of the Earth system.
D
All of the above.
27

Which of the following is a specialist species?

A
Giant Pandas
B
Horses
C
Humans
D
Rabbits
28

What is the main advantage to using satellites to measure climate change?

A
They can measure aspects of climate globally.
B
They are unaffected by the weather conditions they measure.
C
They are a universal tool for measuring all factors of climate.
D
They can measure the amount of rainfall a specific area receives.
29

Which of the following statements about positive feedback mechanisms is not true?

A
Positive feedback mechanisms can result from human activity.
B
Positive feedback mechanisms can occur naturally.
C
Positive feedback mechanisms lead to increased change.
D
Positive feedback mechanisms reduce change in a system.
30

Humans evolved in the Eocene period.

A
T
B
F

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