Courtship, fertilisation and development in vertebrates, the stages in the development of the toad, the bird's egg and parental care. The life histories of insects and the earthworm are in the SS1 notes.
In these notes
- Sexual reproduction
- External and internal fertilisation
- Examples
- Parental care
- Courtship behaviour
- How the young develop
- Development of the toad
- The bird's egg
- Worked theory answer
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