Pearson Edexcel Advanced Subsidiary In Biology B (8BI0) Paper 02: Core Physiology and Ecology QP & MS June 2024

Pearson Edexcel Advanced Subsidiary In Biology B (8BI0) Paper 02: Core
Physiology and Ecology QP & MS June 2024

, surname names



Number Number




Morning (Time: 1 hour 30 minutes) Paper


B ■ ■


Advanced Subsidiary
PAPER 2: Core Physiology and Ecology




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P74475A
©2024 Pearson Education Ltd.
F:1/1/1/1/1/1/1/1/1/

, Answer ALL questions.

Some questions must be answered with a cross in a box . If you change your mind about an




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answer, put a line through the box and then mark your new answer with a cross .
1 A problem that has developed in recent years is the emergence of bacteria that are
resistant to some antibiotics.
(a) (i) Which of the following will lead to fewer resistant bacteria?
(1)
A antibiotics being given to farm animals to prevent disease

B doctors only prescribing antibiotics that are effective against
the pathogen
C doctors only prescribing antibiotics for viral infections

D patients stopping taking the antibiotics when they feel better


(ii) Which of the following would cause an increase in resistant bacteria?
(1)




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A antibiotic use leads to increased competition between bacteria

B the antibiotic reducing the frequency of mutations in the bacteria

C the resistant bacteria being killed by the antibiotic

D the resistant bacteria surviving the antibiotic




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, (b) The bacteria referred to as MRSA are resistant to many antibiotics.

The graph shows the number of cases of MRSA in several US states from
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2005 to 2016.
30
Cases per 100,000 population




25

20

15 Community cases
10

5
Hospital cases
0
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016

Year
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(i) Explain why the number of hospital cases of MRSA is lower than the number
of community cases of MRSA.
(2)

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(ii) Explain the changes in hospital cases and community cases from
2012 to 2016.
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(2)

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