(a)[3]
Describe the pattern of results shown in Fig. 1.2.
(b(i))[2]
Calculate the percentage rise in nest sites from 1975 to 2000. Show your working.
(b(ii))[2]
Suggest two reasons why the crocodile population in Everglades National Park has risen.
Biology 9700 · AS & A Level · Conservation
Conservation — practice question
The American crocodile, Crocodylus acutus, was listed as an endangered species by the USA in 1975. It occurs in estuarine areas of southern Florida. Fig. 1.1 shows an American crocodile. Water salinity was considered to affect the distribution of the American crocodile.
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This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “A greater number of nests in low-salinity areas / in less salty water” …
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