2024 Pearson Ed excel Advanced
Level
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, Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Wednesday 5 June 2024
Afternoon (Time: 2 hours)
Paper
reference 9BN0/01
� �
Biology A (Salters Nuffield)
Advanced
PAPER 1: The Natural Environment and Species
Survival
You must have: Total Marks
Calculator, HB pencil, ruler
Instructions
•• Use black ink or ball-point pen.
Fill in the boxes at the top of this page with your name,
• Answer
centre number and candidate number.
all questions.
•• Show all your working out in calculations and include units 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.
In questions marked with an asterisk (*), marks will be awarded for your ability to structure
your answer logically showing how the points that you make are related orfollow on from each
other where appropriate.
Advice
• Read
• Try
each question carefully before you start to answer it.
to answer every question.
• your answers if you have time at the end.
Check
Turn over
, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 Silver Springs is an ecosystem in Florida.
Energy flow through this ecosystem has been studied.
The value for the light energy entering this ecosystem is 7 112 800 kJ m–2 yr–1. The gross
primary productivity (GPP) for this ecosystem is 87 069 kJ m–2 yr–1. The value for
respiration (R) in this ecosystem is 55 195 kJ m–2 yr–1.
(a) (i) Which of the following is the correct value for the net primary productivity(NPP) in
this ecosystem?
(1)
A 7 025 731 kJ m–2 yr–1
DO NOT WRITE IN THIS AREA
B 697 036 kJ m–2 yr–1
C 142 264 kJ m–2 yr–1
D 31 874 kJ m–2 yr–1
(ii) The table shows some information on trophic levels in this ecosystem.
Energy intake Energy fixed as biomass
Trophic level
/ kJ m–2 yr–1 / kJ m–2 yr–1
Primary consumers 14 092 4 615
Secondary consumers 1 602 464
Tertiary consumers 88 21
2
, ����
Level
[Type the company name]
ype the company address]
[Type the phone number]
[Type the fax number]
[Pick the date]
, Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Wednesday 5 June 2024
Afternoon (Time: 2 hours)
Paper
reference 9BN0/01
� �
Biology A (Salters Nuffield)
Advanced
PAPER 1: The Natural Environment and Species
Survival
You must have: Total Marks
Calculator, HB pencil, ruler
Instructions
•• Use black ink or ball-point pen.
Fill in the boxes at the top of this page with your name,
• Answer
centre number and candidate number.
all questions.
•• Show all your working out in calculations and include units 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.
In questions marked with an asterisk (*), marks will be awarded for your ability to structure
your answer logically showing how the points that you make are related orfollow on from each
other where appropriate.
Advice
• Read
• Try
each question carefully before you start to answer it.
to answer every question.
• your answers if you have time at the end.
Check
Turn over
, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 Silver Springs is an ecosystem in Florida.
Energy flow through this ecosystem has been studied.
The value for the light energy entering this ecosystem is 7 112 800 kJ m–2 yr–1. The gross
primary productivity (GPP) for this ecosystem is 87 069 kJ m–2 yr–1. The value for
respiration (R) in this ecosystem is 55 195 kJ m–2 yr–1.
(a) (i) Which of the following is the correct value for the net primary productivity(NPP) in
this ecosystem?
(1)
A 7 025 731 kJ m–2 yr–1
DO NOT WRITE IN THIS AREA
B 697 036 kJ m–2 yr–1
C 142 264 kJ m–2 yr–1
D 31 874 kJ m–2 yr–1
(ii) The table shows some information on trophic levels in this ecosystem.
Energy intake Energy fixed as biomass
Trophic level
/ kJ m–2 yr–1 / kJ m–2 yr–1
Primary consumers 14 092 4 615
Secondary consumers 1 602 464
Tertiary consumers 88 21
2
, ����
