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ELL Biology Ch 7
The Study of Plants
| Term | Definition |
|---|---|
| photosynthesis | the process by which light energy is used to make food |
| chlorophyll | green substance in chloroplasts that absorbs light energy for photosynthesis |
| chloroplasts | part of plant cell that uses sunlight to make food |
| roots | plant part which anchors it in soil and absorbs water and minerals |
| stem | plant part which supports the leaves and transports water, food, and minerals |
| leaves | plant parts which make food by photosynthesis (singular = leaf) |
| xylem | tissue in roots and stems that transports water and nutrients |
| phloem | tissue in roots and stems that transports food |
| soil | a mixture of sand, silt, and clay |
| loam | soil that has a well-balanced mixture of sand, silt and clay |
| humus | the organic material in soil |
| autotroph | an organism which makes its own food |
| heterotroph | an organism which eats other organisms for food |