Bacteria are essential to life on earth because: (a) They are decomposers. (b) They are capable of converting atmospheric nitrogen into nitrates. (c) They help to recycle essential chemical elements. (d) All of the above are correct.

What advantages does a pedigree have over a written passage?

The data below simulate what happened to peppered moths in england after the industrial revolution which statement best describes the process that produced one of the emding populations of moths ?light colored moths were selected for on light colored trees

Add solid urea to a beaker of water. the beaker gets very cold. is δh favorable or