(a(i))[2]
Describe what the term diffusion means.
(a(ii))[1]
State the type of energy required for diffusion.
(b(i))[1]
State the name of the process in human cells that produces carbon dioxide.
(b(ii))[1]
On Fig. 1.1, draw an arrow showing the direction in which carbon dioxide molecules diffuse.
(c)[3]
Identify the type of particle movement shown by arrow Q. Explain your answer.
(d)[2]
Suggest why particle R is not starch.
(e)[6]
Using Fig. 1.2 and Fig. 1.3, describe and explain how the cells look different before and after immersion in salt solution.