most of the time they cant. they need help with a male that has bred before.
The only thing that will encourage a female Betta to release her eggs is a male Betta with a proper nest.
pretty much nothing, they just lay eggs
Yes female Angle can lay their eggs without a male. But the eggs will not be fertile.
When a female beta is ready to breed she develops a horizontal line the length of her body.
No, the female cannot lay eggs without a male, unless they have mated before hand and the female is willing to continue laying the eggs.
ovaries
No. Without a male they cannot produce eggs.
When the bearded dragons go through intercourse, the eggs are fertilized inside of the female already. So when the female lays the eggs, they are already fertilized.
She does not lay eggs and she can not have nymphs without a male
If your goldfish is female and full of eggs, she may release them in the tank. If there is no male in the tank with her, she may very well simply reabsorb the eggs without ever releasing them at all.
the female cant lay egg without the male
Yes, they can...although the eggs will be infertile