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PRACTICAL APPLICATIONS IN BIOLO
, EDEXCEL A LEVEL JUNE 2023
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 21 June 2023
Morning (Time: 2 hours) Paper
reference 9BN0/03
Biology A (Salters Nuffield)
Advanced
PAPER 3: General and Practical Applications in Biology
You must have: Total Marks
Ruler, HB pencil, scientific calculator and a copy of the
scientific article adapted from Scientific American (enclosed)
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 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.
• structure
In questions marked with an asterisk (*), marks will be awarded for your ability to
your answer logically, showing how the points that you make are related
or follow on from each other where appropriate.
Advice
• Read each question carefully before you start to answer it.
• Try to answer every question.
• Check your answers if you have time at the end. Turn over
, Answer ALL questions.
Write your answers in the spaces provided.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
1 The heart pumps blood around the circulation system.
(a) Explain why many animals need a heart and circulation system.
(2)
(b) If the heart of an animal is removed from its body, the heart will continue to beat
for a period of time.
The left atrium stops contracting if it is separated from the rest of the heart.
However, the right atrium and the rest of the heart will continue to beat.
Eventually, the right atrium and the rest of the heart will also stop beating.
(i) Give a reason why the heart will continue to beat after being removed from
the body.
(1)
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