Which type of molecule makes up the double layer of a cell membrane?

Explain why phospholipid molecules form a bilayer. (3 marks)

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time