(a(i))[1]
State the energy source for this food web.
(a(ii))[2]
Finish Table 2.1 by entering the number of different organisms in this food web that match each description. The first entry has already been completed for you.
(a(iii))[2]
Use Fig. 2.1 to explain why the hawk feeds at two different trophic levels.
(b(i))[2]
Explain why shrews require more oxygen while they dive in very cold water.
(b(ii))[4]
Explain how the capacity of shrews to store oxygen may have evolved through natural selection.