(a(i))[2]
On Fig. 3.1, identify and label two visible structures in cell P.
(a(ii))[1]
State the name of the tissue visible in Fig. 3.1.
(a(iii))[3]
The tissue shown in Fig. 3.1 is transparent. Explain why it is beneficial to the plant for the tissue shown in Fig. 3.1 to be transparent.
(b)[3]
Describe the function carried out by stomata.
(c(i))[2]
Ions move into guard cells by active transport. Describe how the ions move into the guard cells.
(c(ii))[5]
Describe and explain how the change in ion concentration affects guard cell volume. Use the information in Table 3.1 in your answer.
(c(iii))[2]
Suggest two environmental factors that can cause plants to wilt.