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Why can you not catch the same cold twice, but a new cold will make you sick for a week or two?
Herbaceous
Pertaining to plants that have non-woody stems and die back at the end of the growing season to the ground level.
Eudicot
One of the two clades of flowering plants; eudicot seeds
Pith
The central core of tissue in the stems of many vascular plants, often used for storage and transport of nutrients.
Photosynthesis
The process by which green plants and certain other organisms transform light energy into chemical energy.
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