![Page 1: KEY CONCEPT Seeds disperse and begin to grow when conditions are favorable](https://reader036.vdocuments.mx/reader036/viewer/2022062410/56815b63550346895dc95031/html5/thumbnails/1.jpg)
22.3 Seed Dispersal and Germination
KEY CONCEPT Seeds disperse and begin to grow when conditions are favorable.
![Page 2: KEY CONCEPT Seeds disperse and begin to grow when conditions are favorable](https://reader036.vdocuments.mx/reader036/viewer/2022062410/56815b63550346895dc95031/html5/thumbnails/2.jpg)
22.3 Seed Dispersal and Germination
Animals, wind, and water can spread seeds.
• Seeds dispersed by animals can have nutritious fruits or fruits that cling.
![Page 3: KEY CONCEPT Seeds disperse and begin to grow when conditions are favorable](https://reader036.vdocuments.mx/reader036/viewer/2022062410/56815b63550346895dc95031/html5/thumbnails/3.jpg)
22.3 Seed Dispersal and Germination
• Seeds dispersed by wind can have wing- or parachute-like fruits.
Cypselae
Double samaras
![Page 4: KEY CONCEPT Seeds disperse and begin to grow when conditions are favorable](https://reader036.vdocuments.mx/reader036/viewer/2022062410/56815b63550346895dc95031/html5/thumbnails/4.jpg)
22.3 Seed Dispersal and Germination
• Seeds dispersed by water can have fruits that float.
![Page 5: KEY CONCEPT Seeds disperse and begin to grow when conditions are favorable](https://reader036.vdocuments.mx/reader036/viewer/2022062410/56815b63550346895dc95031/html5/thumbnails/5.jpg)
22.3 Seed Dispersal and Germination
Seeds begin to grow when environmental conditions are favorable.• Seed dormancy is a state in which the embryo has stopped
growing. – Dormancy may end
when conditions are favorable.
– While dormant, embryo can withstand extreme conditions.
![Page 6: KEY CONCEPT Seeds disperse and begin to grow when conditions are favorable](https://reader036.vdocuments.mx/reader036/viewer/2022062410/56815b63550346895dc95031/html5/thumbnails/6.jpg)
22.3 Seed Dispersal and Germination
• Germination begins the growth of an embryo into a seedling.
– water causes seed to swell and crack coat– embryonic root, radicle, is first to emerge– water activates enzymes that help send sugars to
embryo
![Page 7: KEY CONCEPT Seeds disperse and begin to grow when conditions are favorable](https://reader036.vdocuments.mx/reader036/viewer/2022062410/56815b63550346895dc95031/html5/thumbnails/7.jpg)
22.3 Seed Dispersal and Germination
• Germination begins the growth of an embryo into a seedling. – water causes seed to swell and crack coat– embryonic root, radicle, is first to emerge – water activates enzymes that help send sugars to embryo
– embryonic shoot, plumule, emerges next
![Page 8: KEY CONCEPT Seeds disperse and begin to grow when conditions are favorable](https://reader036.vdocuments.mx/reader036/viewer/2022062410/56815b63550346895dc95031/html5/thumbnails/8.jpg)
22.3 Seed Dispersal and Germination
• Germination begins the growth of an embryo into a seedling. – water causes seed to swell and crack coat– embryonic root, radicle, is first to emerge – water activates enzymes that help send sugars to
embryo– embryonic shoot, plumule, emerges next – leaves emerge last
![Page 9: KEY CONCEPT Seeds disperse and begin to grow when conditions are favorable](https://reader036.vdocuments.mx/reader036/viewer/2022062410/56815b63550346895dc95031/html5/thumbnails/9.jpg)
22.3 Seed Dispersal and Germination
• Once photosynthesis begins, the plant is called a seedling.