Unformatted text preview: _____________. 7. Net ______ productivity is defined as the total amount of energy fixed per unit of time minus the amount of energy expended by the metabolic activities of the photosynthetic organisms in the community. 8. Secondary consumers such as _________ and the parasites of animals, feed on the herbivores. 9. Only about ____% of the sunlight falling on the plant leaves is captured by photosynthesis. 10. Except for nitrogen, _________ is the element most likely to be present in amounts so small as to limit the growth of plants. 97...
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- Spring '08
- Photosynthesis, metabolic activities, permeable underground layer