"General Comments:  
 Good content! There are just some small grammatical issues that I outlined below. They are easy fixes! 

 Grammar:  

 Comma after ultimately in first paragraph: ""ultimately,..."" 

 Put ""primarily"" after is for concise flow in second paragraph: ""experiences is primarily due..."" 

 ""A majority of plant growth is because of root development and recent studies show how competitive A. cristatum since it beats out other forms of vegetation in grassland environments."" - insert ""is"" after cristatum. Comma after development since you're connecting two independent clauses with a conjunction (and).  
 Also, it's my personal opinion that the sentence should be split into two separate sentences. It's grammatically sound if you make the above edits, but I think your comment on root development and the plant's competitive nature aren't clearly related enough to warrant placing them in the same sentence.  

 ""Experimental studies conducted on the competitiveness of A. cristatum provide data"" is redundant since you already mentioned ""recent studies"" on competitiveness in the previous sentence. Replace this with ""These studies provide data..."" 

 ""This data give significant insights into why A. cristatum is so competitive and why the development of this"" - this data gives 

 Finally, I think the first sentence of your third paragraph can be said in the active voice to let readers know what the paragraph is about first thing, i.e., ""researchers can annotate important functional genes... by utilizing...""  

  
 References: 

 Good job!"