AQA AS Biology EMPAWatch
Our whole class has no idea what its about and i have mine the first day back after easter and my teachers dont want to reply to my email! Im glad its not just our class being stupid though!! Hopefully someone might help us understand soon!
3.1.3 Substances are exchanged between organisms and their environment by passive oractive transport across exchange surfaces. The structure of plasma membranes enablescontrol of the passage of substances across exchange surfaces.
3.2.4 The variety of life is extensive and this is reflected in similarities and differences in itsbiochemical basis and cellular organisation.