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APES-2015-Chp03

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1.
1 point
The ________ cycle does not include the atmosphere.
2.
1 point
Aerobic respiration requires ________ .
3.
1 point
In nitrogen fixation, ________ combine gaseous N2 with hydrogen to make ammonia (NH3).
4.
1 point
Going into forests and other natural settings to observe and measure the structure of ecosystems and what happens in them is known as ________ .
5.
1 point
The lower portion of the ________ holds enough ozone gas to filter out about 95% of the sun's harmful ultraviolet radiation.
6.
1 point
________ cannot produce the nutrients they need through photosynthesis or other processes.
7.
1 point
________ have a very high Net Primary Productivity (NPP) because they have a large number and variety of producer trees and other plants.
8.
1 point
A food chain determines how ________ and nutrients move along pathways from one organism to another.
9.
1 point
The biosphere and its ecosystems are made up of ________ components.
10.
1 point
The earth would be too cold to support life if not for what natural process?
11.
1 point
Along with water vapor, a key component of the atmosphere's thermostat is ________ .
12.
1 point
________ feed on the flesh of herbivores.
13.
1 point
The water cycle is powered by ________ .
14.
1 point
A small amount of the earth's water ends up in the ________ .
15.
1 point
The ________ includes all life on the earth.
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