it attacks the other fish most likely killing it.
Quant
if it is floating to the top, it means that your betta is sick. if it swims to the top and stays there, it is a normal behaviour of a betta.
diseased.
With anything new to it's environment, a betta fish will be cautious of anything new to it's tank (this is because of their territorial traits). But depending on the betta, it will take a day or so for it to get used to the props/scenery. But don't be surprised if the betta stays clear of a certain area, he/she may not know if it is safe or not.
Bettas breathe air from the surface of their bowl so it really depends on the humidity of the area that the betta is in when it is out of its bowl. If the betta's body stays well moisturized I'm convinced they can at least live two days out of water (conditions permitting).
What's the general environment? If you don't have some source of oxygen the betta fish will try to conserve oxygen and not move around. I suggest putting in elodea.
You won't have any betta fry. The FEMALE betta is the one you remove right after spawning. The male stays in the fry tank until they're free-swimming.
If the frequency stays the same, then the wavelength stays the same.
No, when the time is right she will release her eggs even if there is no male around. It is no different from pet birds who sometimes lay unfertilized eggs. The female betta will probably eat her eggs to regain any lost nutrients after she releases them; if not, it is safe and harmless to simply remove them from the tank with your regular water changes. They are unfertilized.
It stays on
stays the same
The price of oil will increase as the supply decreases.
it will be musty & moldy