Which is true about the function of the cell membrane?

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above

15. what can be inferred from the fact that there is little diversity in the form of mc1r gene found among individuals from equatorial africa?

Why are some body cells responsive to a particular hormone, whereas others are not? responsive cells have complex signal transduction pathways, whereas cells that do not respond to a particular hormone lack these pathways. responsive cells express a receptor specific for the hormone. all of these choices are correct. responsive cells are located closer to the gland that releases the hormone. whether or not a cell responds to a hormone depends entirely on what type of cell it is (liver cell vs. fat cell vs. nerve cell), because hormones only activate one type of cell.