Chapter 2: Principles of Ecology
Chapter 2: Principles of Ecology
Chapter 2: Principles of Ecology
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Oxygen-Carbon Cycle<br />
9<br />
1. Carbon dioxide (CO 2 )<br />
and oxygen (O 2 ) are<br />
found in the atmosphere<br />
2. Plants use CO 2 to<br />
make their own food<br />
(photosynthesis)<br />
2. Animals and plants<br />
use the O 2 to make<br />
energy (respiration)<br />
3. During photosynthesis,<br />
plants release O 2 back into the<br />
atmosphere<br />
3. During respiration, animals<br />
and plants release CO 2 back<br />
into the atmosphere
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