AQA
A-Level
BIOLOGY
3.3 | Organisms Excange Substances
3.1 | Surface Area to Volume Ratio
Time allowed
49 minutes
QUESTION PAPER
Score Percentage
/41 %
4.1 | CELL BIOLOGY | QUESTION PAPER 1 1
, 1. (a) The oxygen dissociation curve for haemoglobin shifts to the right during vigorous exercise.
Explain the advantage of this shift.
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(3)
(b) Weddell seals are diving mammals that live in cold environments. A Weddell seal is
shown in Figure 1.
Figure 1
By Jerzystrzelecki (own work) [CC BY 3.0] via Wikimedia Commons
(i) Explain how the body shape of a Weddell seal is an adaptation to living in a
cold environment.
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(2)
A-Level
BIOLOGY
3.3 | Organisms Excange Substances
3.1 | Surface Area to Volume Ratio
Time allowed
49 minutes
QUESTION PAPER
Score Percentage
/41 %
4.1 | CELL BIOLOGY | QUESTION PAPER 1 1
, 1. (a) The oxygen dissociation curve for haemoglobin shifts to the right during vigorous exercise.
Explain the advantage of this shift.
........................................................................................................................
........................................................................................................................
........................................................................................................................
........................................................................................................................
........................................................................................................................
........................................................................................................................
(3)
(b) Weddell seals are diving mammals that live in cold environments. A Weddell seal is
shown in Figure 1.
Figure 1
By Jerzystrzelecki (own work) [CC BY 3.0] via Wikimedia Commons
(i) Explain how the body shape of a Weddell seal is an adaptation to living in a
cold environment.
...............................................................................................................
...............................................................................................................
...............................................................................................................
...............................................................................................................
(2)
