Petals drop off and the ovary becomes the fruit and ovule becomes the seed
arthium
It is not up to the plants when to or not to produce flowers. It depends on how healthy the plant is after fertilisation. The healthier the plant is, the faster it will produce flowers.
The flower drops off and allows the seed forming process to take place.
Most flowers seek to attract pollinating insects for cross-fertilisation. They do not want their flowers to be eaten before setting seeds for future off-spring.
The 2 fertilisation's are external fertilisation, or internal fertilisation. External fertilisation is the type frogs do.
fertilisation
external
They use internal fertilisation.
internal
fertilisation first
Fertilisation of Orchids was created in 1877.
The 2 fertilisation's are external fertilisation which the frog does, or internal fertilisation.