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Unformatted text preview: Day # What happens Each seed contains a tiny new plant, called an embryo. The outside of the seed is called the seed coat. A seed can remain dormant for years, as long as it stays dry and cool. 1-2 A day or two after planting and watering, the tiny seed germinates. During germination, the seed takes up water and swells until its seed coat cracks. The radicle (embryonic root) emerges first, followed by the hypocotyl (stem) and two cotyledons (seed leaves). 2-3 The hypocotyl pushes through the soil, pulling the cotyledons along with it. No longer needed, the seed coat drops from the cotyledons to the soil. 4 Aboveground, the hypocotyl elongates as the plant reaches upward for light. 5-13 Above ground, the true leaves, stems, and flowers originate at a point at the very top of the plant, called the shoot meristem (growth tip). Each part emerges gradually, then it grows larger and the growth is measurable from day to day....
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This note was uploaded on 12/06/2011 for the course ENG 100 taught by Professor Posh during the Summer '11 term at San Mateo Colleges.
- Summer '11