Forum:Monster Effects and Trap Effects

I have a question about the 'priority' effects of monster cards. So here is the scenario:

I summon 'Gravekeeper's Descendant' from my hand. My opponent responds to the summon by activation 'Bottomless Trap Hole'.

So can I call priority on my Descendant's ignition effect? If I target Bottomless Trap Hole, will it still destroy my Descendant; or will its activation be negated?

So far my understanding is that I can not evade my Descendant's removal from play (unless I chain with a counter-trap). But I believe I can still use Descendant's effect to destroy another card my opponent controls? Correct? -- But now lets use another scenario.

I summon Descendant. Opponent responds to summon and activates Book of Moon.

Will I still be able to call priority on Descendant's effect? Or will i be unable to activate the effect? -- Another scenario

Opponent already has Jinzo on the field. Opponent summons a monster. I activate Solemn Judgment and respond to that monster's summoning. Will Jinzo be able to negate solemn judgment?

Solemn Judgment is a counter trap and has a spell speed of 3, Jinzo is a continuos effect, so what happens? --

THANKS