Mark Scheme (Results)
Summer 2025
Pearson Edexcel Advanced Subsidiary GCE
In Biology B (8BI0)
Paper 02: Core Physiology and Ecology
,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
Summer 2025
Question Paper Log Number P78690A
Publications Code 8BI0_02_2506_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.
• Mark schemes will indicate within the table where, and which
strands of QWC, are being assessed. The strands are as
follows:
i) ensure that text is legible, and that spelling, punctuation and
grammar are accurate so that meaning is clear
ii) select and use a form and style of writing appropriate to
purpose and to complex subject matter
iii) organise information clearly and coherently, using specialist
vocabulary when appropriate.
Summer 2025
Pearson Edexcel Advanced Subsidiary GCE
In Biology B (8BI0)
Paper 02: Core Physiology and Ecology
,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
Summer 2025
Question Paper Log Number P78690A
Publications Code 8BI0_02_2506_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.
• Mark schemes will indicate within the table where, and which
strands of QWC, are being assessed. The strands are as
follows:
i) ensure that text is legible, and that spelling, punctuation and
grammar are accurate so that meaning is clear
ii) select and use a form and style of writing appropriate to
purpose and to complex subject matter
iii) organise information clearly and coherently, using specialist
vocabulary when appropriate.
