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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 |