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Question 18M.3.HL.TZ1.17b

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Date May 2018 Marks available [Maximum mark: 3] Reference code 18M.3.HL.TZ1.17b
Level HL Paper 3 Time zone TZ1
Command term Explain Question number b Adapted from N/A
b.
[Maximum mark: 3]
18M.3.HL.TZ1.17b
(b)

Explain biogeographic factors that increase the effectiveness of nature reserves.

[3]

Markscheme

a. large area can support greater range of habitats / longer food chains / higher population numbers 

b. low edge effect with circular reserves

OR

reduced edge effect minimises area that is disturbed/competition 

c. intact / unbroken areas represent less disturbance on habitats 

d. fragmented areas linked by corridors 

e. (proximity of fragmented areas) allows for animal movement / genetic exchange

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