A-LevelBiologyBiodiversity and conservation9700/43 · May/June 2023 · Q109 Marks

(a) The moose, Alces alces, is a large member of the deer family. It lives in temperate forests in North America and northern Europe, where snow is present for large parts of the year. Fig. 10.1 shows an adult male moose feeding in a lake. Fig. 10.1 The moose feeds on a plant in the lake called watermilfoil, Myriophyllum aquaticum. The moose and the watermilfoil belong to the domain Eukarya, which includes the kingdoms Animalia and Plantae. Describe the main differences between the kingdom Animalia and the kingdom Plantae.

(a)Describe the main differences between the kingdom Animalia and the kingdom Plantae.[4]
(b)(i)Calculate the rate of increase in temperature per decade between 1980 and 2020. Show your working. Write your answer to two decimal places. answer °C per decade[2]
(b)(ii)Moose populations have decreased in North America since 1980. Suggest and explain reasons for the decrease in moose populations.[3]

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Mark scheme

Marking points from the official mark scheme (May/June 2023). The mark or mark type is shown in brackets.

any four from:
[1] Animalia | no cell walls | and | Plantae | cell walls | ;
[1] Animalia | no, chlorophyll / chloroplasts | and | Plantae | chlorophyll / chloroplasts | ;
[1] Animalia | heterotroph | and | Plantae | autotroph / photosynthesis | ;
[1] Animalia | glycogen | and | Plantae | starch | ;
[1] Animalia | nervous system | and | Plantae | no nervous system | ;
[1] Animalia | move from place to place | and | Plantae | unable to move from place to place | ;
[1] Animalia | no, permanent / central, vacuole | and | Plantae | permanent / central, vacuole | ;
[1] (0.86 – 0.28) / 4 or 0.58 / 4 ; OR (0.85 – 0.28) / 4 or 0.57 / 4 ;
[1] 0.15 ; OR 0.14 ;
Allow ecf if divided by 5 and equals 0.12
any three from:
[1] climate change / described ;
[1] less food/less watermilfoil;
[1] less, snow / cover, so more predation ;
[1] more hunting;
[1] increased competition;
[1] loss of habitat / deforestation ;
[1] (new) disease ;

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