they do itb internally not externelly
yes
Petal - dries up or drops off
Platypus fertilisation occurs internally.
fallopian tubes
It wouldn't be able to reproduce.
The 2 fertilisation's are external fertilisation, or internal fertilisation. External fertilisation is the type frogs do.
The oviduct is the only way through which the sperm may reach the egg for fertilisation to happen. If the oviduct is blocked, then the sperm cannot reach the egg and so fertilisation cannot happen, so the woman cannot have a child without an IVF.
the koala eats toxic leaves and it it adapted to eating them so the toxins don't effect it, so if it didn't addapt to it, the koala would probably eat something else
Koalas do not have eggs. They are mammals, so they give birth to live young, and do not lay eggs. Fertilisation occurs internally, in the fallopian tubes. This is like what happens in other mammals, including humans.
fertilisation
external
They use internal fertilisation.