3.6 understand how germinating seeds utilise food reserves until the seedling can carry out photosynthesis

A developed seed contains:

1. A food store
2. An embryo
3. Hard seed coat

When it starts to germinate (has the right conditions) it gets glucose for respiration from it's own food store. This gives it energy to grow.

Once the plant has grown enough it doesn't have to rely on the food stores as it can use photosynthesis.