no it isn't true
Yes, it will not harm you.
No, only a lemon can grow from a lemon seed. That's why it is called a lemon seed. If an orange grew from it, it would be an orange seed.
An orange is a fruit with seeds inside.
With a seed
It will do you no harm to swallow an orange seed. It will simply pass through your system without being digested.
Probably. But if it tries to push out of the orange peels the sprout will break.
it grows faster in waterrrr
The only way to grow an orange tree is from an orange seed. Answer: Orange trees are propagated from cuttings. Basically this means cutting a small piece of a branch off and sticking it in the ground and it will grow roots. (It's alot more complicated than that but that is the basic idea) If you grow an orange tree from a seed it will not be 'true' to the parent. This means that if the seed comes from the most beautiful tasting orange the tree that the seed produces may grow horrible oranges.