Question about mishapen leaves

Hey All,

I have a couple quick questions if anyone would be so kind as to answer.

Is one obviously deformed leaf on a plant an indication of a deficiency? If so what?

Can you stop a plant from ever blooming by accidently changing it's 12/12 light cycle?
Or does it just slow the process and diminish your yield?

If the plant doesn't fully develop all 5,6 or 7 leaf parts at the very top of a blooming plant is there a deficiency?

I've read a lot on these forums probably 2-3 hours daily and there's just so much info.

Anyone care to either answer or point me to a old faq?

Thanks,

PipeDreamer420

could be a deficianty but if you disturb the dark period too much this can also cause wierd leaves
have a pic?