(a)[1]
State what this apparatus is called.
(b)[2]
Explain why the rate of water uptake by the leafy part of the plant shown in Fig. 2.1 will not match the rate of transpiration.
(c(i))[3]
With the apparatus shown in Fig. 2.1, the rate of water uptake at $25\,^{\circ}\text{C}$ was greater than at $20\,^{\circ}\text{C}$. Explain how raising the temperature affects the rate of water uptake.
(c(ii))[2]
State two environmental conditions, apart from temperature, that will affect the rate of water uptake of a leafy twig as shown in Fig. 2.1.
(d)[3]
Transpiration is sometimes called an ‘inevitable consequence of gas exchange’ in plants. Explain this statement.