(a)[2]
State two visible features that separate the fish in Fig. 1.1 from the amphibian in Fig. 1.2.
(b)[1]
State the name of one other vertebrate group.
(c)[4]
Describe the similarities and the differences between the circulatory systems of the fish and the amphibian in Fig. 1.3 and Fig. 1.4.
(d)[3]
Explain the advantages of the mammalian type of circulatory system compared with the type found in fish.
(e)[4]
Explain how the structure of arteries and veins is linked to the difference in the pressure of the blood carried by these vessels.
(f)[3]
Complete the Table 1.1.