Please help!! picture for question is attached: Which of the following is not true regarding this model of transduction?

A. Bonded signal molecules activate the cell permanently.
B If the signal molecule isn't bonded to the surface protein, the ions cannot enter the cell
C Internal ions will stimulate some type of cellular response.
D Signal transductions are a protection mechanism that helps increase cellular efficiency.

Most of earth’s fresh water is found in oceans and seas stored in glaciers and ice caps groundwater stored beneath the surface found in lakes, rivers, streams, and reservoirs

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

Under the soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources. select the best answer from the choices provided a b c d