Germinating Seeds (Edexcel IGCSE Biology)

Revision Note

Germination

  • Germination is the beginning of seed growth

  • The seed contains a zygote that develops into the embryo

  • During germination, the embryo grows into a seedling

    • Cotyledons surround the embryo, storing food for the seedling

    • Some plants have one cotyledon, others have two

    • Cotyledons provide energy until the plant can photosynthesize

  • Water absorption splits the seed coat (testa), allowing the plumule (first emerging shoot) and radicle (first emerging root) to emerge

germinating-seed-structures

The structures of a germinating seed

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Lára Marie McIvor

Author: Lára Marie McIvor

Expertise: Biology Lead

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.