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This item has been discontinued.
1498 left in stock.
Because radishes grow so fast, tropisms (natural predilections to grow in certain directions) are easy to observe.
See how roots grow toward water, leaves tilt toward light, stems bend against gravity. Graph growth rates on a sigma curve. A great hands-on introduction to plants and how they grow! 2 Lessons for late elementary and junior high students.
Oversize Pb, illus.
No resources.
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