Inquiry Summary

Plants are an important source of food for humans. In addition, they provide drugs and dyes.

Do you get more calories in your diet from roots, stems, or leaves of plants?

Different Layers Soil Rehion

FIGURE 7.26

Soil layers. The layers can sometimes be seen in road cuts such as this one in Australia. The upper layers developed from bedrock. The dark upper layer is home to most of the organisms that live in the soil.

FIGURE 7.26

Soil layers. The layers can sometimes be seen in road cuts such as this one in Australia. The upper layers developed from bedrock. The dark upper layer is home to most of the organisms that live in the soil.

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