At the moment, nothing.

Yes, he meant that zapping the food slows the rotting process, it doesn't matter how rotted it is before you zap it.

Yes, praying to one god reduces favor for all gods in a certain range based on your wisdom, I believe, neutral or not.

The whistle calls your pets to your side, the magical whistle teleports all of your pets to your side.

That's not entirely true, he replaces limbs IIRC.

Don't get me wrong, Capristo, I'm more than willing to answer his questions, I'm just asking him because some of his questions are already answered elsewhere. But I suppose I can't blame him for not wanting to look.

Yes and yes.

It'd be greatly appreciated if you read into the forums and the wiki for your questions, as they're all either very simple or already answered elsewhere.

Wands are rechargeable with scrolls of charging.

Yes, killing Genetrix and dying on the same floor means you will not be able to encounter the body of the person you were just playing as, on another character. This is intentional as if you could do that you could go ahead and, for example, kill Genetrix and die, and then when you got to that level again, with a new character, Genetrix would still be dead, which would give the player an unfair advantage.

Baiting the ghost over the body can be difficult but you shouldn't necessarily be forcing yourself to do it whenever possible.

The fusing of a head is taken care of when you resurrect the headless body, all you need to do is place the head on the same tile as the body.

Ah! I forgot of an exception to what I said before, you can't resurrect humanoids if you decapitated them, unless you put a replacement head with the body.

If memory serves, mind.

Yeah, the color coding makes Dwarf Fortress (adventure mode) substantially easier to play without really watching.

Unless they are uniques in certain builds of the game (cvs? livan?), yes.