(a(i))[1]
State the letter that labels the region containing cells with the largest number of chloroplasts.
(a(ii))[1]
State any two regions that have cells with no chloroplasts.
(b)[1]
Explain why Fig. 4.1 shows the leaf in daylight.
(c(i))[2]
Identify the tissues shown as H and I.
(c(ii))[4]
Describe what these two tissues do.
(d)[3]
Name a gas whose concentration slowly rises in the air space during the hours of darkness. Give an explanation for your answer.