Its a research project about duckweed population ecology experiment.

its a research project about Duckweed population ecology experiment. i need some background and literature searches about duckweed and how different ph levels will affect the growth of the duckweed. i attached file about how to write the paper  

i would also want you to talk about how the ph levels will effect plants in general and duckweed is specific. and please please attach the references link