Mark Scheme (Results)
January 2025
Pearson Edexcel International Advanced Level In
Biology (WBI14)
Paper 01 Energy, Environment, Microbiology, and
Immunity
,Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding
body. We provide a wide range of qualifications including academic, vocational,
occupational and specific programmes for employers. For further information visit our
qualifications websites at www.edexcel.com or www.btec.co.uk. Alternatively, you can
get in touch with us using the details on our contact us page at
www.edexcel.com/contactus.
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help everyone
progress in their lives through education. We believe in every kind of learning, for all kinds of
people, wherever they are in the world. We’ve been involved in education for over 150 years,
and by working across 70 countries, in 100 languages, we have built an international reputation
for our commitment to high standards and raising achievement through innovation in
education. Find out more about how we can help you and your students at:
www.pearson.com/uk
January 2025
Question paper log number P78445A
Publications Code WBI14_01_2501_MS
All the material in this publication is copyright
© Pearson Education Ltd 2025
,General Marking Guidance
• All candidates must receive the same treatment. Examiners
must mark the first candidate in exactly the same way as they
mark the last.
• Mark schemes should be applied positively. Candidates must be
rewarded for what they have shown they can do rather than
penalised for omissions.
• Examiners should mark according to the mark scheme not
according to their perception of where the grade boundaries
may lie.
• There is no ceiling on achievement. All marks on the mark
scheme should be used appropriately.
• All the marks on the mark scheme are designed to be awarded.
Examiners should always award full marks if deserved, i.e. if the
answer matches the mark scheme. Examiners should also be
prepared to award zero marks if the candidate’s response is not
worthy of credit according to the mark scheme.
• Where some judgement is required, mark schemes will provide
the principles by which marks will be awarded and
exemplification may be limited.
• When examiners are in doubt regarding the application of the
mark scheme to a candidate’s response, the team leader must
be consulted.
• Crossed out work should be marked UNLESS the candidate has
replaced it with an alternative response.
, Question Answer Mark
number
1(a)
The only correct answer is C
A is incorrect because Box J is GPP, Box K is R and Box L is NPP
B is incorrect because Box J is GPP, Box K is R and Box L is NPP
D is incorrect because Box J is GPP, Box K is R and Box L is NPP
(1)
Question Answer Mark
number
1(b)
The only correct answer is D
A is incorrect because the units are energy per area per time = kJ m-2 yr-1
B is incorrect because the units are energy per area per time = kJ m-2 yr-1
C is incorrect because the units are energy per area per time = kJ m-2 yr-1
(1)
January 2025
Pearson Edexcel International Advanced Level In
Biology (WBI14)
Paper 01 Energy, Environment, Microbiology, and
Immunity
,Edexcel and BTEC Qualifications
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding
body. We provide a wide range of qualifications including academic, vocational,
occupational and specific programmes for employers. For further information visit our
qualifications websites at www.edexcel.com or www.btec.co.uk. Alternatively, you can
get in touch with us using the details on our contact us page at
www.edexcel.com/contactus.
Pearson: helping people progress, everywhere
Pearson aspires to be the world’s leading learning company. Our aim is to help everyone
progress in their lives through education. We believe in every kind of learning, for all kinds of
people, wherever they are in the world. We’ve been involved in education for over 150 years,
and by working across 70 countries, in 100 languages, we have built an international reputation
for our commitment to high standards and raising achievement through innovation in
education. Find out more about how we can help you and your students at:
www.pearson.com/uk
January 2025
Question paper log number P78445A
Publications Code WBI14_01_2501_MS
All the material in this publication is copyright
© Pearson Education Ltd 2025
,General Marking Guidance
• All candidates must receive the same treatment. Examiners
must mark the first candidate in exactly the same way as they
mark the last.
• Mark schemes should be applied positively. Candidates must be
rewarded for what they have shown they can do rather than
penalised for omissions.
• Examiners should mark according to the mark scheme not
according to their perception of where the grade boundaries
may lie.
• There is no ceiling on achievement. All marks on the mark
scheme should be used appropriately.
• All the marks on the mark scheme are designed to be awarded.
Examiners should always award full marks if deserved, i.e. if the
answer matches the mark scheme. Examiners should also be
prepared to award zero marks if the candidate’s response is not
worthy of credit according to the mark scheme.
• Where some judgement is required, mark schemes will provide
the principles by which marks will be awarded and
exemplification may be limited.
• When examiners are in doubt regarding the application of the
mark scheme to a candidate’s response, the team leader must
be consulted.
• Crossed out work should be marked UNLESS the candidate has
replaced it with an alternative response.
, Question Answer Mark
number
1(a)
The only correct answer is C
A is incorrect because Box J is GPP, Box K is R and Box L is NPP
B is incorrect because Box J is GPP, Box K is R and Box L is NPP
D is incorrect because Box J is GPP, Box K is R and Box L is NPP
(1)
Question Answer Mark
number
1(b)
The only correct answer is D
A is incorrect because the units are energy per area per time = kJ m-2 yr-1
B is incorrect because the units are energy per area per time = kJ m-2 yr-1
C is incorrect because the units are energy per area per time = kJ m-2 yr-1
(1)
