This question is basically 2005 HSC Q27 slightly re-worded and without the background information given about the influenza virus. Anyway, I'll take a shot at answering the HSC question:
27. The influenza virus has a high rate of mutation which can lead to changes of the viral
surface antigens...
b) In plants, water is passively transported from the roots to the leaves via the XYLEM by an evaporation-cohesion-adhesion mechanism (transpiration stream theory):
- EVAPORATION of water from the leaf cells through the stomates initiates the pull of a ‘transpiration stream’. Water is then drawn...