Can someone please help me with these? worth 50 points plus brainliest!!

In what for do plants utilize nitrogen? why do they need nitrogen?

As scientists have investigated evolution from a variety of fields, they have found that some of darwin's orginal ideas were inaccurate or incomplete. t explanation provided by evolution was updated each time to reflect the new information they found. what does this suggest about the theory of evolution? it has become a stronger and clearer theory as new information is collected.

We all have different forms of genes from our parent(s).what are these different forms called? a.alleles b.characters c.dna d.resources