Fig. 1 shows the marine iguana, Amblyrhynchus cristatus.

Fig. 1
(i) Marine iguanas are reptiles.
State two features that are used to classify animals as reptiles.
[2]
(ii) State two structures that are present in plant cells that are not present in the cells of reptiles.
[2]
Marine iguanas feed on seaweed. Seaweed contains starch.
(i) State the names of two parts of the digestive system where starch is digested by enzymes.
[2]
(ii) Explain why the shape of an enzyme is important for digestion.
[3]
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