Which of the following is the most important source of aluminum ore?

bauxite

pyrite

goethite

hematite

How are the tortoises that darwin observed on the galápagos islands similar to the anoles that losos studied

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d

Some plants have reproductive structures that them reproduce using natural forces or animals. how does the reproductive structure shown here ensure the reproductive success of plants?