One similarity between cell receptors and antibodies is that both 1. are produced by nerve cells 2. are highly specific in their actions 3. slow the rates of chemical reactions 4. are involved in digestion

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?