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Edexcel Biology A (Salters-Nuffield) Paper 1 | Environment & Species Survival A+

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Prepare for success in your Pearson Edexcel GCE Biology A (Salters-Nuffield) Paper 1: The Natural Environment and Species Survival exam with this verified and updated 2025/2026 test bank. This comprehensive resource includes authentic Edexcel-style exam questions and accurate answers, covering key areas such as biodiversity, conservation, genetics, photosynthesis, evolution, and adaptation. Fully aligned with the Edexcel A Level Biology A (Salters-Nuffield) specification, this A+ rated study pack builds deep understanding of ecological principles and enhances exam readiness. Perfect for A Level students, tutors, and self-learners, this guide ensures clarity, accuracy, and top performance in Edexcel Biology Paper 1.

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Candidate surname Other names


Centre Number Candidate Number


Level 3 GCE
Time 2 hours
Paper
reference 9BN0/01
Biology A (Salters Nuffield)
Advanced
PAPER 1: The Natural Environment and
Species Survival


Marks




Instructions
• Use black ink or ball‑point pen.
• Fill in the boxes at the top of this page with your name,
centre number and candidate number.
• Answer all questions.
• Show your working in any calculation questions and include units in your answer
where appropriate.
• Answer the questions in the spaces provided
– there may be more space than you need.

Information
• The total mark for this paper is 100.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• You may use a scientific calculator.
• Into questions
u u u u u
u marked with an asterisk (*), marks will be awarded for your ability
u u u u u u u u u u u u
u structure your answer logically, showing how the points that you make are
u u u u u u u u u u u u
urelated uor ufollow uon ufrom ueach uother uwhere uappropriate.


Advice
• Read each question carefully before you start to answer it.
• Try to answer every question.
u u u u u u u u u



•• Check
u
your answers if you have time at the
u u
end. Good luck with your examination.
u u u
u u
u
u
u
u u u


Turn uover


P65458A
1/1/1/1/1/1/

, Answer uALL uquestions.

Some uquestions umust ube uanswered uwith ua ucross uin ua ubox . uIf uyou
uchange uyour umind uabout uan uanswer, uput ua uline uthrough uthe ubox and
uthen umark uyour unew uanswer uwith ua ucross .

1 Climate uchange uhas ubeen ulinked uto uthe urelease uof ucarbon udioxide ufrom usome upower ustations.

(a) The umain ureason uthat ucarbon udioxide uacts uas ua ugreenhouse ugas uis ubecause uit
(1)
A absorbs uinfrared uradiation ureflected uby uthe usurface uof uthe
uEarth

B absorbs uultraviolet uradiation ureflected uby uthe usurface uof uthe
uEarth

C reflects uinfrared uradiation uabsorbed uby uthe usurface uof uthe
uEarth

D reflects uultraviolet uradiation uabsorbed uby uthe uEarth’s
uatmosphere (1)


(b) Name uthe uplant uorganelle uthat ufixes ucarbon udioxide ufrom uthe
uatmosphere.


. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. u u .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. . .. u
u ....................... u


(c) Net uprimary uproductivity u(NPP) uis ua umeasure uof uthe uincrease uin ubiomass uof ua uplant.
Explain uwhy urespiration uaffects uthe uproduction uof ubiomass.
(2)

. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. u u .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. .. ... .. .. .. . .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... u
u ....................... u


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u ....................... u




2

, (d) Some upower ustations uburn uwood uchips uinstead uof ufossil ufuels uto uproduce

uelectricity. uThe uphotograph ushows uwood uchips uat ua upower ustation.




© uMr. uAmarin uJitnathum/Shutterstock

It uis uthought uthat uburning uwood uchips uis umore ubeneficial uto uthe
uenvironment ubecause uin uthe ulong uterm uit udoes unot uadd ucarbon udioxide uto
uthe uatmosphere.

Explain uwhy uburning uwood uchips udoes unot uincrease ucarbon udioxide uto
uthe uatmosphere uin uthe ulong uterm.
(4)

. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. u u .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. ... .. .. ... u
u ....................... u


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u ....................... u


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3
Turn over

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u ....................... u

(Total ufor uQuestion u1 u= u8 umarks)




4

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Uploaded on
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Number of pages
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Written in
2025/2026
Type
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