What is the correct term for measurement of geographic distribution of species

Glutamic acid: hydrophilic or hydrophobic? positive, negative, or neutral? valine: hydrophilic or hydrophobic? positive, negative, or neutral?

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons